Many a commentator has suggested the Enterprise-D is much too large for its crew complement, including this youtube video from seven years ago viewed 3.5 million times, and this thread from three and a half weeks ago. But these commentators have forgotten several very important members of the crew with very large space requirements: the dolphins.
The Enterprise-D's dolphins, i.e., Cetacean Ops, is a canonical facility on the D, referenced in two TNG episodes. If we are going off the non-canonical Technical Manual, Cetacean Ops is crew

