User blog comment:LeonTheDoge/SEA TREADERS ARE NOW SPAWNABLE! @O@/@comment-26996876-20160413072016

Sea Treaders and Crabsquids are defensive.

However, the sounds for Crabsquids haven't yet been implemented, so.... yea~

Also, Spine Eels currently use the Bone Shark's AI, and Lava Larvae's animations are in, as well.