Marine Life & Conservation Blogs
Creature Feature: Great Hammerhead Shark

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.
We’re kicking off the new year with a classic shark – the Great Hammerhead. Known for their distinct silhouette, the Great Hammerhead is the largest species of hammerhead on the planet.
With a distinct notch on the centre of their head, the Great Hammerhead is light grey or brown above and white below. Reaching a maximum size of around six metres, this is a big shark. There are nine species of hammerhead. Identifying them often relies on looking at head shape. The Great Hammerhead has a much straighter front edge compared to the Scalloped and Smooth Hammerheads.
The unique hammer-shaped head (a.k.a. cephlafoil) improves their manoeuvrability. As the position of their eyes enable them to see 360°. And enhances their ability to detect electrical currents, a sixth sense that all sharks have. Sharks have lots of tiny pores covering their head and snout, called ampullae of Lorenzini. These are extremely sensitive and can detect even the faintest of electrical fields. Including those generated by the Earth’s geomagnetic field, or muscle contractions in prey. The broad flat head of a hammerhead provides a much larger surface area for these pores. Which is why they’re so good at finding prey – such as stingrays – completely buried beneath the sand.
Great Hammerheads are nomadic and seasonally migratory. They move towards the equator during the winter and then towards the poles during the summer. Unlike other species, they are solitary and migrate up to 1,200km (750 miles) alone.
The Great Hammerhead is Critically Endangered. Populations have declined in recent years. They are targeted and also caught as bycatch.
Although large and powerful, research has shown that Great Hammerheads are quite fragile. They are particularly vulnerable to the stress of capture. Recent research has found that individuals that are hooked have a 50% chance of dying following release. Combating the declining populations comes down to, as always, implementing scientifically informed catch limits and enforcing these.
The species is important for dive tourism in some areas. In the video below, head of marketing for the Shark Trust – Caroline, takes in the view as a Great Hammerheads cruise by. They are a true sight to behold.
SCIENTIFIC NAME: Sphyrna mokarran
FAMILY: Sphyrnidae
MAXIMUM SIZE: 610cm
DIET: Varied. Preference for stingrays, other rays and marine catfish.
DISTRIBUTION: Worldwide, tropical seas.
HABITAT: Coastal-pelagic and semi-oceanic. Close inshore to well offshore. 1-300m or more.
CONSERVATION STATUS: Critically Endangered
Images from Frogfish Photography
Distribution Map from 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.
Blogs
Hunting Lionfish Safely and Responsibly in Curaçao

Curaçao, a picturesque island in the southern Caribbean, is not only renowned for its stunning beaches and vibrant culture but also for its commitment to preserving its marine ecosystems. One of the key threats to these delicate ecosystems is the invasive lionfish. To combat this menace, responsible hunting practices are crucial.
In this comprehensive guide, we will explore how to hunt lionfish safely and responsibly in Curaçao, including the use of pole spears (the only legal method in Curaçao). We will provide you with the top 10 safe hunting practices, including the use of a Zookeeper. We will also address what to do if you are stung by a lionfish and emphasize the importance of consulting with local experts before embarking on your lionfish hunting adventure.
Why Safe and Responsible Lionfish Hunting is Important
Lionfish (Pterois spp.) are native to the Indo-Pacific region but have become invasive predators in the Caribbean, including the waters surrounding Curaçao. Their voracious appetite for native fish species and rapid reproduction rates poses a severe threat to the delicate balance of marine ecosystems in the region. The introduction of lionfish has led to a decline in native fish populations and the degradation of coral reefs.
To counteract the lionfish invasion, responsible hunting practices are essential. Hunting lionfish can help control their population and protect the native marine life of Curaçao’s waters. However, it is imperative to follow safe and responsible hunting techniques to minimize the impact on the environment and ensure the safety of both divers and the marine ecosystem.
Understanding the Pole Spear
In Curaçao, the only legal method for hunting lionfish is using a pole spear. It’s important to note that a pole spear is distinct from other spearfishing equipment, such as a Hawaiian sling or a spear gun with a trigger mechanism. The use of Hawaiian slings or spear guns with triggers is illegal in Curaçao for lionfish hunting due to safety and conservation concerns.
A pole spear consists of a long, slender pole with a pointed tip, often made of stainless steel or fiberglass, designed for precision and accuracy. Unlike a trigger-based spear gun, a pole spear requires the diver to manually draw back on a rubber band then release towards the target, providing a more controlled and selective approach to hunting.
How to Hunt Lionfish Using a Pole Spear Responsibly
When using a pole spear to hunt lionfish, it’s crucial to do so responsibly to ensure the safety of both the diver and the marine environment. Here are some essential guidelines on how to hunt lionfish using a pole spear responsibly:
- Safety First: Always prioritize safety when diving and hunting. Ensure you have the necessary training and experience for hunting lionfish. Consider the Lionfish Scuba Dive Experience offered by Ocean Encounters. This opportunity allows participants to learn under the expert guidance of local scuba diving professionals.
- Check Regulations: Familiarize yourself with local regulations and restrictions related to lionfish hunting in Curaçao. Respect no-take zones and marine protected areas.
- Target Only Lionfish: Use your pole spear exclusively for lionfish hunting. Do not attempt to spear any other species, as this can harm the fragile ecosystem.
- Aim for Precision: Approach your target lionfish carefully and aim for a precise shot to minimize the risk of injuring other marine life or damaging the coral reef.
- Use a Zookeeper: A Zookeeper is a specialized container designed to safely store and transport lionfish after capture. It prevents the lionfish’s venomous spines from causing harm and keeps them secure during the dive.
- Respect Lionfish Anatomy: Target the head of the lionfish and stay away from its venomous spines. Aim for a clean and humane kill to minimize suffering.
- Avoid Overhunting: Do not overhunt lionfish in a single dive. Limit the number of lionfish you catch to what you can safely handle and process.
- Practice Good Buoyancy: Maintain excellent buoyancy control to avoid inadvertently damaging the reef or stirring up sediment, which can harm marine life.
- Dispose Responsibly: Once you’ve caught lionfish, carefully place them in your Zookeeper. Do not release them back into the water, as they are invasive and harmful to the ecosystem.
- Report Your Catch: If applicable, report your lionfish catch to local authorities or organizations involved in lionfish management to contribute to data collection efforts.
In the Unlikely Event of a Lionfish Sting
While lionfish stings are rare, it’s essential to know how to respond if you or someone you are diving with is stung. Lionfish have venomous spines that can cause pain, swelling, and even more severe reactions in some cases. Here’s how to respond to a lionfish sting:
- Signal for Help: Notify your diving buddy or group immediately if you are stung.
- Remove Spines: If the spines are still embedded in the skin, carefully remove them with tweezers or a clean, sterile tool. Be cautious not to break the spines, as this can release more venom.
- Clean the Wound: Rinse the affected area with warm water to help alleviate pain and reduce the risk of infection.
- Pain Management: Over-the-counter pain relievers like ibuprofen or acetaminophen can help with pain and swelling. However, if you experience severe symptoms, seek medical attention promptly.
- Seek Medical Help: If the pain and swelling worsen or if you have an allergic reaction to the venom, seek medical assistance immediately.
Consult Local Lionfish Experts
Before embarking on a lionfish hunting adventure in Curaçao, it’s crucial to consult with local and responsible dive shops or organizations dedicated to lionfish management, such as Lionfish Caribbean.
These experts can provide valuable insights, tips, and up-to-date information on how to hunt lionfish safely and responsibly, hunting locations, safety measures, and environmental conservation efforts.
Start Planning your Next Caribbean Adventure
Knowing how to hunt lionfish safely and responsibly in Curaçao is not just an exciting underwater activity but also a crucial step in protecting the island’s marine ecosystems. By using a pole spear and adhering to the top 10 safe hunting practices, including the use of a Zookeeper, you can contribute to the control of the invasive lionfish population while preserving the delicate balance of Curaçao’s underwater world.
Remember that safety should always be your top priority when diving and hunting lionfish. In the unlikely event of a lionfish sting, knowing how to respond can make all the difference. By consulting with local experts and following ethical and legal guidelines, you can enjoy a rewarding and responsible lionfish hunting experience while safeguarding the beauty of Curaçao’s marine environment for generations to come. Please always dive safely and responsibly, and together, we can make a positive impact on Curaçao’s underwater world while learning how to hunt lionfish effectively.
Blogs
The life of a Great White Shark

The great white shark, known scientifically as Carcharodon carcharias, embodies the apex predator of the ocean. This majestic creature’s life is a testament to survival, adaptability, and the intricate balance of the marine ecosystem.
Born in the waters off coastal regions, a great white shark begins its life as a pup within the safety of nurseries, typically found in warm, shallow waters. The pups, measuring around 5 feet in length at birth, are immediately equipped with an innate instinct for survival.
As they grow, great whites embark on a journey, venturing into deeper and cooler waters, often covering vast distances across the ocean. These apex predators are perfectly adapted hunters, relying on their impressive senses to detect prey. Their acute sense of smell, aided by specialized sensory organs known as ampullae of Lorenzini, helps detect the faintest traces of blood in the water from several miles away.
Feeding primarily on seals, sea lions, and other marine mammals, great whites are known for their powerful jaws lined with rows of razor-sharp teeth. Their hunting techniques often involve stealth, utilizing their streamlined bodies to approach prey from below and striking with incredible speed and force.
Despite their fearsome reputation, great whites play a crucial role in maintaining the health of marine ecosystems. As top predators, they help regulate the population of prey species, preventing overpopulation that could disrupt the balance of the food chain.
Reproduction among great white sharks is a slow and careful process. Females reach sexual maturity between 12 and 18 years of age, while males mature earlier, around 9 to 10 years old. Mating occurs through complex courtship rituals, with females giving birth to a small number of live pups after a gestation period of about 12 to 18 months.
However, the life of a great white shark is not without challenges. Human activities, including overfishing, pollution, and habitat destruction, pose significant threats to their population. Additionally, despite their formidable presence, great whites are vulnerable and face dangers from entanglement in fishing gear and accidental bycatch.
Despite these challenges, great white sharks continue to inspire awe and fascination among scientists and nature enthusiasts. Their presence in the ocean serves as a reminder of the delicate balance and interconnectedness of marine life, emphasizing the need for conservation efforts to protect these magnificent creatures for future generations to admire and study.
Want to learn more about sharks? Visit The Shark Trust website: www.sharktrust.org
Photos: avalon.red
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