A crab (Cancer productus)
A Ferengi crab
A crab is a large crustacean native to Earth.
When Uhura tried to match the sound of the whale probe to the sound of an Earth animal aboard the Klingon Bird-of-Prey HMS Bounty, a Rock crab (Cancer productus) was one of the animals shown. (Star Trek IV: The Voyage Home)
Crabs are Ferengi delicacies. Grand Nagus Zek's son Krax was fond of crabs. (DS9: "The Nagus")
Keiko O'Brien often made crab rolls. (DS9: "Tacking Into the Wind")