"The signature fish of Cozumel, Mexico, the Splendid Toadfish (Sanopus splendidus)is only known to be found in this area~ traditionally they are found under ledges and back in deep holes in the reef during the day emerging only at night to hunt. This toadfish is unique in that it has only been found in one place. Cozumel Island, Mexico..  "

http://en.wikipedia.org/wiki/Splendid_toadfish 

During my dives in Cozumel last week, I didn't quite understand why our DM would get so excited when he'd find one of those ugly grayish striped fish that hid under rocks... but what the heck- I'd humor him and take a ton of pics of the thing..  (along with scorpionfish, lol...).. Come to find out, the Splendid Toadfish is indigenous to Cozumel~ so I'm pretty happy that I did take all of those pics after all..