This is a kind of lobster:
And this a squid:
Below is Number 45:
And Number 57 and 58:
These are Sea Cucumbers. Apparently when Sea Cucumbers feel threatened they spit out their guts and "breathing apparatus" at their perceived predator, coating it in sticky slime. They can then grow a new one. Which seems a small comfort somehow.
Lastly we have a Coelecanth. It's a bit out of place in this list, given its having a spine, but I thought it had a nice, sympathetic color. Apparently the people who know about these things thought the Coelecanth had been extinct for millions of years. Then they found some swimming about happily in the 40's. It's never too late.

