I'd probably be a hermit crab, I keep to myself and everybody pretty much forgets that I'm there. Also cause it's a crustacean and crustaceans are basically bugs but in the water
I would be a Snapping Turtle - active for only about half the year (the warmer months) and can be calm and friendly in a safe environment but can get very snappy when threatened.
Chambered Nautilus easily. Always felt a connection with them.
I also have a room dedicated to them in the works but I need to catch more of them since I need about 10 for my display.
Also obligatory re-post of my Christmas TBT event profile picture.
@Sheep Villager
Aw, I really like them too!
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I think for me would be either a moray eel or spotted garden eel. I tend to put on a front that I'm tough but I like my little hidey spots very much.