Omastar (オムスター Omusutā?, Omstar) is the evolution of Omanyte. Omastar went extinct due to its heavy shell making it too sluggish to capture prey despite the fact that its ability is "swift swim". When it does capture prey, it uses its tentacles, which developed similarly to hands and feet, to hold its prey, and tear at it with its fangs within the mouth. If met with molluscs, such as Shellder, it cracks the shell and sucks on the toes. Its appearance seems to be based on the ammonite, an extinct cephalopod that resembles a Chambered Nautilus.