here's one which is kinda gross.. the Greenland or Sleeper Shark
is a huge shark which lives in cold waters...
most of them have a copepod which grows in the eyes of the shark,
rendering it blind...
note the worm-like thing coming out of its eye..
there are theories which have not been proven that the copepod,
which is pinkish-white, help the shark by attracting prey which the
shark senses with electro-senses and smell..
