Omastar looks a lot like a Nautilus, a prehistoric creature related to squids. Omastar has a spiked spiral shell, which is heavy enough that it is hard for Omastar to swim. It has eight blue tentacles all over its body. Omastar also has a mouth that has two pairs of manibles. It has yellow eyes with a slight black split pupil. Its face resembles that of a seastar, except for that the top of the star is cut off by the spiral shell.