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.
This time we’re showcasing the robust Porbeagle, one of the only known sharks that may love to play..
Shaped like a rugby ball, this muscular stocky shark is incredibly hydrodynamic and built for endurance. Dark grey-blue in colour with a white belly, they have a pointed snout and large black eyes.
Porbeagle’s belong to an elite group of sharks known as the mackerel sharks. These include some of the most powerful and agile sharks in the world, such as the White Shark and Shortfin Mako. This group are endothermic, so can keep themselves nice and warm, due to a remarkable adaptation known as a rete mirabile. This makes them more efficient hunters and able to tolerate colder waters.
Porbeagle’s look a lot like White Sharks, so are often mistaken for them. As they’re found in UK waters, this has led to many false reports of White Sharks in the UK. But Porbeagle’s are around half the size. Although still a large shark, the biggest Porbeagle on record is 3.6m. While the largest White Shark is 6m.
Found worldwide in cold-temperate waters, Porbeagle’s are strong swimmers. Travelling thousands of miles in search of food and to give birth. One individual, tagged in Irish waters, journeyed over 2,000 miles to Newfoundland in Canada. A known mating ground for Porbeagle’s.
Porbeagle’s may live on their own, or in small groups made up of similar sized or same sex individuals. With males and females coming together usually in September-November to mate. Yet in some places this can take place in January.
These sharks reproduce slowly, so are extremely vulnerable to destructive fishing. Females take 12-16 years to reach sexual maturity, males 6-10 years. After 8-9 months, females will give birth to litters of just 1-5 pups, which are relatively large at 60-80cm long.
Two distinct populations exist – the north Atlantic and south Pacific. Individuals from these areas don’t seem to mix, resulting in key differences. North Atlantic Porbeagle’s get a lot bigger, and don’t tend to live as long as those in the south Pacific.
During the day Porbeagles tend to spend their time in deeper waters, rising to the surface at night. They’re opportunistic feeders, mostly eating small fish – such as mackerel, whiting and herring – as well as octopus, squid and cuttlefish.
Highly inquisitive, Porbeagles have been seen chasing each other, rolling at the surface, and even pushing around floating objects and kelp. Could they be playing? Currently there are no scientific studies to back this up. But what an interesting study that would be…!
- SCIENTIFIC NAME: Lamna nasus
- FAMILY: Mackerel Sharks (Lamnidae)
- MAXIMUM SIZE: 3.6m
- DIET: Small fish & squid
- DISTRIBUTION: Wide-ranging in temperate waters (except North Pacific).
- HABITAT: Coastal and oceanic waters from 0-1,800m deep. Prefers temperatures below 18°C but can tolerate -1–23°C.
- CONSERVATION STATUS: Vulnerable
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.
Header Image: Doug Perrine / Alamy
Project SIARC through to the finals of The National Lottery Awards
Project SIARC has been nominated alongside 16 other projects from across the UK to be named National Lottery Project of the Year.
The marine environment in Wales is teeming with life; beneath the often-murky waters are little understood species of shark, skate and ray (elasmobranchs) of conservation importance.
Project SIARC is catalysing links between fishers, researchers, communities and government to collaborate and safeguard elasmobranchs and support a green recovery in Wales.
“We are so grateful for this nomination – it’s thanks to all of our wonderful communities, partners and volunteers working with us to help safeguard and celebrate sharks, skates and rays in Wales”, commented Project SIARC Technical Specialist and regular Scubaverse contributor Jake Davies.
For more information about Project SIARC, visit https://www.projectsiarc.com/.
Silent Reef Keepers: The Fight to Save the Caribbean Reef Shark
The Kingdom of the Netherlands will ask for increased protection for the Caribbean reef shark during next month’s Conference of Parties for the Cartagena Convention (COPs) on Aruba. Caribbean reef sharks play a critical role in maintaining a healthy reef ecosystem and building resilience within the oceans. This increased protection is critical for ensuring a sustainable future for this iconic species.
The Caribbean Sea is renowned for its crystal-clear waters, vibrant coral reefs, and a dazzling array of marine life. Among the charismatic inhabitants of this underwater paradise is the Caribbean Reef Shark (Carcharhinus perezii), a species that plays a crucial role in maintaining the health of coral reef ecosystems. In the Dutch Caribbean, these apex predators face mounting threats, but there is hope on the horizon. At the upcoming Conference of Parties for the Cartagena Convention (COPs), the Kingdom of the Netherlands will seek increased protection for these magnificent creatures by listing this species on Annex III of the SPAW Protocol. Annex III includes plant and animal species which require additional protection to ensure this species is able to adequately recover their populations in the Wider Caribbean Region.
Caribbean reef sharks thrive in warm, tropical waters of the Caribbean region, with a distribution range that stretches from Florida to Brazil. This species is one of the most encountered reef shark species throughout the whole Caribbean Sea. Growing up to 3m (9.8ft) in length, this shark is one of the largest apex predators in the reef ecosystem and is at the top of the marine food web, having only a few natural predators.
In addition to being of great economic value, as shark diving is a major draw for divers from around the world, this species is also critical for maintaining balance within the reef ecosystem. Their presence helps regulate the population of smaller prey species, which in turn, prevents overgrazing on seagrass beds and coral reefs and eliminates sick or weak fish from the population. This balance is essential for maintaining the health and diversity of the entire coral reef.
Despite their ecological and economic significance, Caribbean reef sharks in the Caribbean face numerous threats that have led to a population reduction estimated to be between 50–79% over the past 29 years. In the (Dutch) Caribbean this is mainly caused by:
Habitat Degradation: The degradation of coral reefs and seagrass beds due to climate change, pollution, and coastal development has a direct impact on the availability of prey for these sharks. Loss of habitat reduces their ability to find food and shelter.
Overfishing: Overfishing poses one of the most immediate threats to Caribbean reef sharks. They are often caught incidentally in commercial fisheries, where fishermen are targeting other species, or intentionally, where they are sought after for their fins, used in shark fin soup.
A Call for Increased Protection
There are different organizations and individuals working to protect sharks and their habitats in the Dutch Caribbean. A significant milestone was the establishment of protected areas such as the Yarari Marine Mammal and Shark Sanctuary between Bonaire, Saba and St. Eustatius. Another milestone was in 2019 when the Dutch government adopted an International Shark Strategy. The strategy sets out which protective and management actions for sharks and rays are to be taken by the government in all seas and oceans where the Netherlands has influence (including the Dutch Caribbean). Additional efforts are still needed to create more marine protected areas, enhance enforcement, reduce pollution in the ocean, and promote sustainable fishing practices. These species know no (political) boundaries and their protection requires broadscale conservation efforts within the Dutch Caribbean and beyond.
The Caribbean reef shark is a species of paramount importance to the (Dutch) Caribbean’s coral reefs. With the extra protection being requested during the next COPS meeting in Aruba, there is hope that this species will have a healthy future. By recognizing their ecological significance and the challenges they face, we can work together to ensure a brighter future for the Caribbean Reef Shark in the Dutch Caribbean and beyond.
The Dutch Caribbean Nature Alliance (DCNA) supports science communication and outreach in the Dutch Caribbean region by making nature-related scientific information more widely available through amongst others the Dutch Caribbean Biodiversity Database, DCNA’s news platform BioNews and the press. This article contains the results from several scientific studies but the studies themselves are not DCNA studies. No rights can be derived from the content. DCNA is not liable for the content and the in(direct) impacts resulting from publishing this article.
Photo + photo credit: Jim Abernethy-all rights reserved
For more information, please contact: research@DCNAnature.org
WIN a c-monsta Wetsuit Hanger!!!
For this week’s competition, we’ve teamed up with c-monsta to give away one of their wetsuit hangers as a prize!...
WIN a Sharkskin Performance 40L Duffle Bag!!!
For this week’s competition, we’ve teamed up with our good friends at Liquid Sports to give away a Sharkskin Performance 40L Duffle Bag as...
Win a Vasili Lights Fish Lantern!
For this week’s competition, we’ve teamed up with Vasili Lights to give away one of their beautiful Fish Lanterns! Inspired...
WIN a Beuchat Maxlux S Mask and Spy Snorkel!!!
For this week’s competition, we’ve teamed up with our good friends at Beuchat to give away Maxlux S Mask and Spy Snorkel!...
Blogs6 days ago
Discover Peace and Tranquillity in Egypt’s Eastern Desert and its Amazing Red Sea
News1 month ago
A Welcome Return (Part 1)
Blogs2 months ago
Amazing Alonissos – The all round dive vacation destination
Blogs1 week ago
A Flying Visit to Nusa Penida, Bali
News3 months ago
BVI Wreck Week – Diving (Part 3)
News2 months ago
Diving With… Sporades Diving Group in Skopelos & Alonissos Islands, Greece
News1 month ago
A Welcome Return (Part 2)
Marine Life & Conservation2 months ago
Divers head to the Wild Isles to tackle nightmare nets