'Jonah crab' definitions:

Definition of 'Jonah crab'

(from WordNet)
noun
Large red deep-water crab of the eastern coast of North America [syn: Jonah crab, Cancer borealis]

Definition of 'Jonah crab'

From: GCIDE
  • Jonah \Jo"nah\, n. The Hebrew prophet, who was cast overboard as one who endangered the ship; hence, any person whose presence is unpropitious. [1913 Webster]
  • Jonah crab (Zool.), a large crab (Cancer borealis) of the eastern coast of the United States, sometimes found between tides, but usually in deep water. [1913 Webster]