News
Diving with British Marine Life: the European Spider Crab
If you’ve dived in the UK chances are you’ve encountered a European spider crab (Maja brachydactyla). While often overlooked, these crabs display a wide range of behaviours making them brilliant photography subjects and great characters to observe on a dive.
M. brachydactyla is found on the South and West Coast of England and Ireland and is the largest spider crab in the UK. European spider crabs are characterised by their red-yellow body colouration and triangular carapace bearing two distinct frontal spines between the eyes. The claws are relatively narrow with white tips, while their walking legs have dark tips.
Their carapace is covered in tiny barbs, which they use to fix an array of algae in order to ‘decorate’ a fresh moult. Such behaviour is well documented in majid crabs and helps to camouflage their bright exoskeletons. Paul Naylor, marine biologist, photographer and author of Great British Marine Animals, showcases this decorative behaviour on his Vimeo profile.
As well as actively masking their exoskeleton, spider crabs play host to a wide range of epibionts. Sessile organisms such as barnacles, anemones and tunicates settle onto their carapace in their larval stage. This relationship is known as mutualistic; the host benefits from protection from predators via camouflage, and the epibionts (an organism that lives on the surface of another organism) are exposed to sediment resuspended by the host, protection from slow moving predators, and better dispersion of offspring.
Documentary worthy aggregations of spider crabs also occur close to shore around the UK; but surprisingly these dense aggregations, also known as mounds, are driven by moulting rather than breeding. I am yet to witness this phenomenon, but look forward to the day I do!
Hear more from Georgie here: https://georgiebullphotography.home.blog/
Save up to $1100 on select liveaboard dive trips from June through October 2025
Explorer Ventures Fleet is turning up the heat with its new Hot Summer / Cool Prices sale. For a limited time, divers can save $1000 or more on select liveaboard departures from June through October 2025.
Whether you’re ready to dive into crystal-clear summer waters or planning a cool fall escape, this promotion offers major savings on world-class dive adventures in the Galápagos, Turks & Caicos, and the Caribbean.
Hot Summer / Cool Prices – For the Summer Dive Traveler:
From June through August, take advantage of deep discounts on summer getaways. Enjoy up to $1100 off select trips aboard the Humboldt Explorer in the Galápagos or save $1000 on select summer departures aboard Turks & Caicos Explorer Il and Caribbean Explorer II, exploring magic of Saba and St. Kitts.
Cool Fall / Hot Prices – For Travel in the Fall:
Leave the cool weather and falling leaves behind — fall is the perfect time to head south and save. Take $1000 off select departures from September through October aboard Turks & Caicos Explorer II and Caribbean Explorer II.
See all details and departure dates: www.explorerventures.com/discounts-and-specials
Space is limited – and once the trips are full, the savings are gone. Book now to secure your spot!
Looking for other dates or destinations? There are more savings available across the fleet, including liveaboard diving holidays in Indonesia, the Maldives, the Red Sea, and Palau. Explore all current deals here: https://www.explorerventures.com/year-of-savings-dive-liveaboard-specials/
Contact:
1.800.322.3577 (US/Canada) | +1.307.235.0683
About Explorer Ventures Liveaboard Fleet
Since 1987, Explorer Ventures Liveaboard Fleet has been delivering world-class liveaboard diving, blending authentic experiences with a commitment to safety and sustainability. Operating in some of the world’s most breathtaking underwater destinations, their fleet of well-appointed vessels ensures every guest enjoys the highest level of comfort and care.
Explorer Ventures is proud to be the first liveaboard company to collaborate with Green Fins, earning certifications on four vessels: Caribbean Explorer II, Turks & Caicos Explorer II, Tiburon Explorer, and Humboldt Explorer. Notably, Tiburon Explorer and Humboldt Explorer are the only PADI Eco Centers designated in the Galápagos, underscoring their dedication to sustainable and responsible diving practices. With exceptional destinations, a global array of itineraries, and diver-focused design across the fleet, every voyage is crafted for comfort, convenience, and adventure—both above and below the surface.
The Shark Trust Great Shark Snapshot is back for its 4th year! And this time the Shark Trust are asking you to Make Every Dive Count!
The Shark Trust Great Shark Snapshot is back for its 4th year! And this time the Shark Trust are asking you to Make Every Dive Count! The last week of July will see the return of the Shark Trust’s citizen science initiative: The Great Shark Snapshot. It encourages divers and snorkellers, all around the world, to record the sharks and rays that they see. This year it takes place between the 19th and 27th July. Get ready to dive in!
The event is back for its 4th year, and it is happening in “Shark Month”, more commonly known as July! To coincide with a series of events that celebrate all things shark and ray, including Shark Week and the 50th anniversary of Jaws.
Divers, clubs, centres, charter boats and liveaboards are all encouraged to show their support by organising dives and events throughout the week. As well as gathering vital data, the event will provide a chance to celebrate the incredible shark and ray species that live in our ocean.
Information about the species and numbers of sharks and rays the participants find over the week will be added to the Shark Trust’s Shark Log. This global shark census will, over time, allow shark scientists to build a picture of species distribution and any changes that occur
Caroline Robertson-Brown, Marketing Manager at the Shark Trust said “It is great to see this popular citizen science event back for its 4th year. We are asking divers to Make Every Dive Count this year. To identify. Count and Record every shark, ray and eggcase they see during the week-long event. To organise dives especially to take part. Whether you are diving your local dive site, or on a trip of a lifetime, we want divers to join in on the Great Shark Snapshot in July.”
It is easy to join in. Just go diving between 19th and 27th July and record every shark, ray, skate or eggcase that you and your dive group sees. If possible, take photos and some video footage too. Then make sure that you record your sightings on the Shark Trust Shark Log recordings website or by using the Shark Trust app.
This year we have created a digital guide that puts all the information you need in one handy online guide. Which can be downloaded from the website.
The Great Shark Snapshot is a way for divers to get together, go diving, and do something to help shark conservation. Why not dive in?
Find out more here: www.sharktrust.org/snapshot
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