Sea Urchins, Mice and Sand Dollars; Echinoidea

Found when we’re out scuba diving in a variety of different habitats, they are mostly equipped with spines that are not a good idea to touch!

The spines of this echinoid provide cover for the Urchin Clingfish and a variety of juvenile fishies.

Note the short, chunky spines and distinctive markings..

Apparently named after the dark banding that is often seen on the spines. Found amongst the corals; it's a relatively solitary sea urchin.

Attaches items to its body for disguise, as well as having spines for defence. They can be relatively fast-moving.

They may be small and insignificant, but you surely know it if you make contact with one. The spines are quite irritating.

This urchin uses disk like appendages to attach a variety of assorted debris to itself, so as to blend in with the scenery...

Unseen on scuba dives unless you look for them - you can find the white skeletons of their bony cases washed up on the beach.

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