Cephalopods and Sea Cucumbers
Cephalopods means 'head-footed molluscs'. Cuttlefish, squids, and octupuses are all cephalopods, which are in turn part of the Mollusc family. (Incidentally, nudibranchs, are also part of the Mollusc family. So actually, lumping cephalopods and nudibranchs under Squiggly Things wouldn't be wrong.)
When we saw the flamboyant cuttlefish for the first time, it was so small, we thought it was a nudibranch.
Broadclub Cuttlefish
This tiny Bob tail Squid / cuttlefish was about the size of my thumb.
They love to hide in the sand with only their white eyes peeking out
These Reef Cuttlefish were a little bigger - and moved quite fast. Sometimes they change colours as you watch. I have a video on that, but it's very shaky and also bigger than the 100MB allowed on YouTube. So if I ever figure out how to use an editing thingy, I'll put it up sooner or later.
