Trellan crocodile

A Trellan crocodile is a creature.

Trellan crocodiles originate from the salt flats of Trellus V. Trellan crocodiles are dangerous as they release sulphuric acid from sacs in their mouths when they bite. 

In 2372, Quark wondered if Odo had destroyed his quarters on Deep Space 9 by taking the form of a Trellan crocodile.