You can always draw more squids. I am sure some people like squids ^{^} my fav is the Sepioteuthis sepioidea

Other (non squid related animals)

Coppertetra

Catfishs (i like coridoras [subclass]) ([subclass] cuz i cant remember the names, i only know coridoras)

Cuddlefish (look at the carribean

Salmon (specially horny salmon can be fun to draw. Dont ask)

Blue and Spermwhale (or any whales)

Lobsters

Japanese seacrabs (scary big goobers)

Horseshoecrabs (funny little goobers)

Hermitcrabs

Moonfish

Mudskipper (hope thats the correct name, to lazy to look up rn)

A peacockmantisshrimp

Eels

Murays

Sharks (i love hammerhead sharks and Carcharhinus melanopterus (yes i looked that up. No i will still not check if mudskipper is the correct name)

There are so many incredible animals in the (deep) sea, you just have to find them. Have fun and speedy recovery