It spawns in the winter, probably in deep water. Wrymouths have been seen hunting live shrimp, small crabs and hermit crabs in captivity and this is likely a continuation of their natural behavior and diet in the wild.
Wrymouths breed during the colder season, often in submerged areas. In captivity, they have been seen eating live prey such as shrimp, crabs, and hermit crabs, which is consistent with their known feeding habits and diet in their native environment.