Very good for low level oil, chitin, some raw meat, black and white pearls collecting, but there somewhat rare to find.

Pretty useless, just kill them for an easy way to harvest chitin and oil early game.

Gives a small amount of Chitin, Meat, Silica pearls and Oil. In some cases Black Pearls Too :0

I have hundreds of chitin silca pearls and some black pearls go to beach farm these if you can't go ocean yet