Day 5 of Life Beneath the Keel

On Sunday 13 September, at 1800 BST, The Island Trust is live streamingLife Beneath the Keel’ from Plymouth Yacht Haven as part of the Ocean Institute’s virtual Maritime Festival. This is the fifth in a series of blogs about the marine life we hope to discover then.

Day 5:  4 September 2020 | Sea spiders

In UK we  don’t often find Sea spiders on pontoons. They are difficult to spot as they fold their legs into a ball, only a few mm across, and blend into the background (image 1). Extended, they don’t come much bigger than 10mm (image 2). When swimming they look like Victorian mechanical toys. See this short video at YouTube below. They mainly eat hydroids (see Blog on Cnidarians on 2 September) and Bryozoans (see blog on 7 September).

There are, however, giant sea spiders at the bottom of the ocean near Antarctica, South America, Africa and Madagascar, which can be 250mm across!

John Hepburn, Ocean Discoverability Project Manager
4 September 2020