Connect with us
background

Marine Life & Conservation Blogs

Creature Feature: Roughsharks

Published

on

In this series, the Shark Trust will be sharing amazing facts about different species of sharks and what you can do to help protect them.

Take a deep dive with this month’s creature feature – looking at the weird and wonderful Roughsharks. There are five species of Roughshark – all unmistakable due to their unusually large dorsal fins. The Roughshark family is known as the Oxynotidae.  

Roughsharks are small sharks, with two large sail-like dorsal fins which give them an unusual appearance. They also have broad, slightly flattened heads, with small thick lips. They have large to enormous spiracles close behind their eyes. 

Roughsharks are not targeted by fisheries, but being deepsea sharks, they are sometimes caught as bycatch in deepsea bottom fisheries. There is limited research into Roughsharks, due to their scattered distribution and the fact they’re deepsea sharks. Very little is known about their behaviour or biology. 

Caribbean Roughshark 

The Carribean roughshark, as the name suggests, live in the Caribbean. Its first dorsal fin leans forward. And it islight grey or brown in colour. With dark bands and blotches. The pectoral and pelvic fins are noticeably lighter in colour pattern.   

It isn’t targeted by fisheries, but can be caught as bycatch by deepsea fisheries. The species isn’t usually consumed by humans. But is sometimes used as bait. It can be made fit for consumption for meat or oil, by smoking and salting.

Roughsharks have unusual teeth. Their top jawhave spear-like upper teeth, forming a triangular pad. The bottom teeth are very compressed, with a saw-like cutting edge, of around 9-18 rows. The Carribean Roughshark’s feeding behaviours have not been observed. But it’s expected that they feed on bottom invertebrates and small fishes. Like the other Roughsharks, very little is known about their behaviour or ecology.

SCIENTIFIC NAME: Oxynotus caribbaeus 

FAMILY: Oxynotidae 

MAXIMUM SIZE: 150cm 

DIET:   Unknown – likely small fishes and inverterbrate 

DISTRIBUTION:   West-Central Atlantic: Gulf of Mexico, Caribbean coast of Central America & Venezuela.  

HABITAT:  218m – 579m. Over muddy and rocky outcrops and bottoms.  

CONSERVATION STATUS: 

Banner Image – Sailfin Roughshark © Citron / CC BY-SA 3.0 via Wikimedia Commons

Image – Caribbean Roughshark ©Nakedape13 via Wikimedia Commons


For more amazing facts about sharks and what you can do to help the Shark Trust protect them visit the Shark Trust website by clicking here.

The Shark Trust is the leading UK-based shark conservation charity. The team works globally to safeguard the future of sharks, and their close cousins, the skates and rays. Engaging with a global network of scientists, policymakers, conservation professionals, businesses and supporters, to further shark conservation. Established in 1997 to provide a voice for UK sharks, the Shark Trust has an ever-growing number of passionate supporters. And together we're creating positive change for sharks around the world. Want to join us and help protect sharks around the world? Click here! www.sharktrust.org

Blogs

Invitation from The Ocean Cleanup for San Francisco port call

Published

on

the ocean cleanup

6 years ago, The Ocean Cleanup set sail for the Great Pacific Garbage Patch with one goal: to develop the technology to be able to relegate the patch to the history books. On 6 September 2024, The Ocean Cleanup fleet returns to San Francisco bringing with it System 03 to announce the next phase of the cleanup of the Great Pacific Garbage Patch and to offer you a chance to view our cleanup system up-close and personal.
We look forward to seeing you there.

To confirm your presence, please RSVP to press@theoceancleanup.com

PROGRAM

Join The Ocean Cleanup as our two iconic ships and the extraction System 03 return to San Francisco, 6 years and over 100 extractions after we set sail, to create and validate the technology needed to rid the oceans of plastic.
Our founder and CEO, Boyan Slat, will announce the next steps for the cleanup of the Great Pacific Garbage Patch. Giving you a chance to view our cleanup system and the plastic extracted.
Hear important news on what’s next in the mission of The Ocean Cleanup as it seeks to make its mission of ridding the world’s oceans of plastic an achievable and realistic goal.
Interviews and vessel tours are available on request.

PRACTICALITIES 

Date: September 6, 2024
Press conference: 12 pm (noon)
Location: The Exploratorium (Google Maps)
Pier 15 (Embarcadero at Green Street), San Francisco, CA
Parking: Visit The Exploratorium’s website for details.
RSVP: press@theoceancleanup.com
Video & photo material from several viewing spots around the bay

We look forward to seeing you there!

ABOUT THE OCEAN CLEANUP
The Ocean Cleanup is an international non-profit that develops and scales technologies to rid the world’s oceans of plastic. They aim to achieve this goal through a dual strategy: intercepting in rivers to stop the flow and cleaning up what has already accumulated in the ocean. For the latter, The Ocean Cleanup develops and deploys large-scale systems to efficiently concentrate the plastic for periodic removal. This plastic is tracked and traced to certify claims of origin when recycling it into new products. To curb the tide via rivers, The Ocean Cleanup has developed Interceptor™ Solutions to halt and extract riverine plastic before it reaches the ocean. As of June 2024, the non-profit has collected over 12 million kilograms (26.4 million pounds) of plastic from aquatic ecosystems around the world. Founded in 2013 by Boyan Slat, The Ocean Cleanup now employs a broadly multi-disciplined team of approximately 140. The foundation is headquartered in Rotterdam, the Netherlands, and opened its first regional office in Kuala Lumpur, Malaysia, in 2023.

Find out more about The Ocean Cleanup at www.theoceancleanup.com.

Continue Reading

Blogs

Smart Shark Diving: The Importance of Awareness Below the Surface

Published

on

shark diving

By: Wael Bakr

Introduction to Shark Diving Awareness‍

In the realm of marine life, few creatures captivate our interest, and sometimes our fear, like the shark. This fascination often finds a home in the hearts of those who venture beneath the waves, particularly scuba divers who love shark diving. It’s here that shark awareness takes the spotlight. Shark awareness is not just about understanding these magnificent creatures; it’s about fostering respect, dispelling fear, and promoting conservation. As Jacques Cousteau once said, “People protect what they love.” And to love something, one must first understand it.

Shark awareness is not a mere fascination; it’s a responsibility that we owe to our oceans and their inhabitants. From the smallest reef shark to the colossal great white, each species plays a crucial role in the underwater ecosystem. Our understanding and appreciation of these creatures can help ensure their survival.

However, shark awareness isn’t just about protecting the sharks; it’s also about protecting ourselves. As scuba divers, we share the underwater world with these magnificent creatures. Understanding them allows us to dive safely and responsibly, enhancing our experiences beneath the waves.

Importance of Shark Awareness in Scuba Diving

The relevance of shark awareness in scuba diving cannot be overstated. Sharks, like all marine life, are an integral part of the underwater ecosystem. Their presence and behavior directly influence our experiences as divers. By understanding sharks, we can better appreciate their role in the ocean, anticipate their actions, and reduce potential risks.

Awareness is crucial for safety when shark diving. Despite their often-misunderstood reputation, sharks are generally not a threat to humans. However, like any wild animal, they can pose risks if provoked or threatened. By understanding shark behavior, we can identify signs of stress or aggression and adjust our actions accordingly. This not only protects us but also respects the sharks and their natural behaviors.

Moreover, shark awareness enriches our diving experiences. Observing sharks in their natural habitat is a thrilling experience. Understanding them allows us to appreciate this spectacle fully. It’s not just about seeing a shark; it’s about understanding its role in the ecosystem, its behavior, and its interaction with other marine life. This depth of knowledge adds a new dimension to our diving experiences.

Understanding Shark Behavior: The Basics

The first step in shark awareness is understanding shark behavior. Sharks are not the mindless predators they are often portrayed to be. They are complex creatures with unique behaviors and communication methods. Understanding these basics can significantly enhance our interactions with them.

Sharks communicate primarily through body language. By observing their movements, we can gain insights into their mood and intentions. For example, a relaxed shark swims with slow, fluid movements. In contrast, a stressed or agitated shark may exhibit rapid, jerky movements or other signs of discomfort such as gill flaring.

Sharks also use their bodies to express dominance or assertiveness. A dominant shark may swim with its pectoral fins pointed downwards, while a submissive shark may swim with its fins flattened against its body. Understanding these signals can help us interpret shark behavior accurately and respond appropriately.

How Shark Awareness Enhances Scuba Diving Experiences

Shark awareness significantly enhances our scuba diving experiences. It transforms encounters with sharks from mere sightings into meaningful interactions. Knowledge is power, and in this case, it’s the power to appreciate, respect, and safely interact with one of the ocean’s most fascinating inhabitants.

A thorough understanding of behavior when shark diving allows us to interpret their actions and responses accurately. It enables us to recognize signs of stress or aggression and adjust our behavior accordingly. This not only ensures our safety but also promotes responsible interactions that respect the sharks and their natural behaviors.

Furthermore, shark awareness adds a new layer of depth to our diving experiences. It’s one thing to see a shark; it’s another to understand its behavior, its role in the ecosystem, and its interactions with other marine life. This depth of understanding enriches our experiences and fosters a deeper appreciation for our underwater world.

Misconceptions About Sharks: Busting the Myths

Unfortunately, sharks are often misunderstood, feared, and even demonized. These misconceptions can be detrimental, not only to our experiences as divers but also to shark conservation efforts. As part of shark awareness, it’s important to debunk these myths and present sharks in their true light.

First and foremost, sharks are not mindless killing machines. They are complex creatures with unique behaviors and communication methods. They are not interested in humans as prey and, in most cases, prefer to avoid us.

Secondly, not all sharks are dangerous. Out of over 500 species of sharks, only a handful are considered potentially harmful to humans. Most sharks are harmless, and even those that can pose a threat are unlikely to attack unless provoked.

Lastly, sharks are not invincible. They are vulnerable to a host of threats, most notably human activities such as overfishing and habitat destruction. They need our understanding and protection, not our fear and persecution.

Shark Behavior: What to Expect When Scuba Diving

When scuba diving, it’s important to know what to expect from sharks. Most encounters with sharks are peaceful and awe-inspiring. However, as with any wild animal, it’s essential to be prepared and understand their behavior.

Most sharks are shy and cautious creatures. They are likely to observe you from a distance, often circling around to get a better look. This is normal behavior and not a sign of aggression.

However, if a shark becomes agitated or feels threatened, it may exhibit signs of stress such as rapid, jerky movements or gill flaring. In such cases, it’s essential to remain calm, avoid sudden movements, and slowly retreat if possible.

Remember, every encounter with a shark is an opportunity to observe and learn. With understanding and respect, these encounters can be safe, enriching, and truly unforgettable experiences.

Practical Tips for Shark Awareness During Scuba Diving

Being aware of sharks during scuba diving is about more than just understanding their behavior. It’s about applying this knowledge in practical ways to ensure safe and respectful interactions. Here are a few tips for shark awareness during scuba diving.

Firstly, always observe sharks from a safe distance. Avoid approaching them directly or making sudden movements, as this can startle or threaten them.

Secondly, never attempt to touch or feed sharks. This can disrupt their natural behavior and potentially put you at risk.

Lastly, always respect the sharks and their environment. Avoid disturbing their habitat or interfering with their natural behaviors. Remember, we are visitors in their world.

Promoting Shark Conservation through Scuba Diving

Scuba diving offers a unique platform for promoting shark conservation. As divers, we have the privilege of witnessing the beauty and complexity of sharks firsthand. We can share these experiences with others, fostering understanding and appreciation for these magnificent creatures.

Moreover, we can actively contribute to shark conservation. Many diving operators offer opportunities to participate in shark research and conservation initiatives. By participating in these programs, we can help ensure the survival of sharks for future generations.

Lastly, we can advocate for sharks. By sharing our knowledge and experiences, we can help dispel misconceptions about sharks and promote their protection. Every voice counts in the fight for shark conservation.

Courses and Resources for Shark Awareness and Behavior

There are many resources available for those interested in shark awareness and behavior. Scuba Diving International as well as numerous conservation-based organizations offer courses and workshops on shark biology, behavior, and conservation. These courses provide in-depth knowledge and practical skills for interacting with sharks responsibly and safely. From courses like our Marine Ecosystems Awareness Specialty and our Advanced Adventure Certification provide you with the information you need to tackle this new challenge!

Additionally, there are many online resources available, including websites, blogs, and forums dedicated to shark awareness and conservation. These platforms offer a wealth of information and a community of like-minded individuals passionate about sharks.

I encourage anyone interested in sharks to explore these resources, to sign up for one of SDI’s courses call your local dive center or instructor or reach out to your regional representative/ World HQ to find where the class is being taught near you. Knowledge is the first step towards understanding, appreciation, and conservation.

Conclusion: The Role of Shark Awareness in Future Scuba Diving Experiences

As we look to the future, the role of shark awareness in scuba diving will only continue to grow. As our understanding of these magnificent creatures deepens, so too will our appreciation and respect for them. This knowledge will shape our interactions with sharks, enhancing our experiences and promoting responsible and respectful behavior.

Shark awareness is more than just an interest; it’s a responsibility. It’s a commitment to understanding, respecting, and protecting one of the ocean’s most fascinating inhabitants. And it’s a journey that I invite all divers to embark on.

As we dive into the blue, let’s dive with awareness. Let’s dive with respect. And let’s dive with a commitment to understand and protect our underwater world. For in the end, the ocean’s health is our health, and every creature within it, including the sharks, plays a crucial role in maintaining this delicate balance.

Continue Reading

E-Newsletter Sign up!

Instagram Feed

Popular