Gormagander

A Gormagander is a species of cosmozoan rarely encountered by the Federation, but used as food by the Orions and Klingons.

Biology
Gormaganders are known as space whales due to their overall similar shape to the whales of Earth and similar feeding habits. While whales feed on tiny krill in the ocean currents, gormaganders feed on microscopic alpha particles in solar winds. They tend to be very single minded in their feeding, often times forgoing reproduction. These habits have earned gormaganders a place on the Endangered Species List by 2256. 

History
A female gormagander was used as an unwilling living shuttle by Harry Mudd. He used it to escape Klingon captivity and infiltrate the USS Discovery (NCC-1031). 

Gormagander meat was served on Qo'noS. Sylvia Tilly unknowingly bought some from an Orion and ate some before, finding out what it was, she spat it out.