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SCUBA News (ISSN 1476-8011)
Issue 245 - November 2020
https://www.scubatravel.co.uk
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Hello and welcome to SCUBA News. Black Friday even reaches the diving world, with 50% off liveaboards to places like the Galapagos, Maldives and Red Sea.
Contents:
What's new at SCUBA Travel?
Creatures of the Month: Fabulous Feather Stars
Diving news from around the World
Download as a pdf file
Five marine parks protect Kenya's fringing coral reef and there are some great dive sites here.
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New section on the site compares liveaboards, starting with the Carpe Diem fleet in the Maldives.
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Feather Stars - photo credit: NOAA
Relatives of starfish, there are many different species of feather star. Some species have 5 arms, some 200.
By day these beautiful animals keep curled up but on night-dives you see them in their warm colours, with their feathery arms extended.
Photo credit: Jill Studholme
Feather star in Soma Bay, Red Sea, Egypt.
When food is plentiful, with strong currents carrying large amounts of plankton, feather stars will form large groups. Look closely at them and you will often see another animal - a shrimp, crab or fish - living with the feather star.
Feather star "legs" or cirri. Photo credit: NOAA
Ten families of fishes prey on feather stars. If one of their limbs is bitten in half the feather star will slowly regenerate it, growing the arm around 3-4 mm a week.
Photo credit: NOAA
Also known as crinoids, feather stars have a tenacious grip and anchor themselves to coral, seaweed, sponges and the like. They can swim by sweeping their arms up and down, or crawl slowly on the tips of the arms which are bent right over to hold the body away from the sea bed. They spend most of their time though simply anchored in their chosen location, suspension-feeding.
Swimming and crawling feather stars with their associated animals, from National Geographic
Their feathery branches are equipped with numerous tiny tube feet that catch floating food and flick it into grooves which run down each arm. The food is then transported down to the mouth in the centre of the body. Unlike starfish, a feather star's mouth is on the top side of its body.
Photo credit: NOAA
You find feather stars almost everywhere: in tropical, temperate and polar seas.
Photo credit: NOAA
Next time you are night-diving it's worthwhile spending some time examining these lovely creatures.
Phylum: Echinodermata > Sub-Phylum: Crinozoa > Class: Crinoidea > Order: Comatulida
Great British Marine Animals, by Paul Naylor
Angela Stevenson and Tomasz Baumiller, Threadfin hawkfish predation on a stalkless crinoid, Front Ecol Environ 2020; 18( 7): 485-485, doi:10.1002/fee.2272
Tomasz Baumiller and Angela Stevenson, Predation on fossil and Recent ophiuroids, Swiss Journal of Palaeontology, 2019; 137, 189-196.
Our round up of the best underwater news stories of the past month. For breaking news see our Twitter page or RSS feed
Remotest islands in the world to be a massive marine reserve
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Blue Whales make comeback in South Georgia
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Are industrial chemicals killing rare whales and familiar dolphins?
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Now you can explore shipwrecks from home
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Philippine resort owner hit with environmental charges as Boracay cleans up
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EU and US block plans to protect world's fastest shark
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Scientists organize to tackle crisis of coral bleaching
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World's deepest swimming pool opens to divers
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SCUBA News is licensed under a Creative Commons Attribution 4.0 Unported License. This means we are happy for you to reuse our material for both commercial and non-commercial use as long as you: credit the name of the author, link back to the SCUBA Travel website and say if you have made any changes. Some of the photos though, might be copyright the photographer. If in doubt please get in touch.
Photo credits: Tim Nicholson, Jill Studholme, Kristin Riser, Jianye Sui
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SCUBA News
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