Sea Gremlins are a regular enemy in Shadow Hearts in the trials at Wuhan. They appear as amphibian-fish hybrid with red torsos that encorparte large mouths with sharp teeth. The rest of their bodies are blue-green. They have large three-fingered hands and tentacle-like protrusions from the bottom of the torso. On their back they wear a large shell.
Malicious spirit of a man who drowned on land and transformed. It drips oil from its body and makes its prey slip.
Gremlins are creatures said to interfere with mechanical objects, usually planes. It is likely that a sea gremlin would tamper with boats.