Looks like there was an SS-237 named Trigger.
http://en.wikipedia.org/wiki/USS_Trigger_(SS-237)
"
USS Trigger (SS-237) was a
Gato-class submarine, the first ship of the
United States Navy to be named for the
triggerfish, any of numerous deep-bodied fishes of warm seas having an anterior dorsal fin with two or three stout erectile spines."
Sweet.. a submarine.
Not so sweet..
http://www.csp.navy.mil/ww2boats/trigger.htm
89 Men were lost when it sunk and/or was attacked.
I'm supprised I didn't stumble across these articles before since I always randomly seek out things with the number 237 attached to them.