There are 11 different research groups that you need to take a photo of in order to unlock this trophy. They are:
Houdini Splicer
Leadhead Splicer
Nitro Splicer
Spider Splicer
Thuggish Splicer
Bouncer
Rosie
Little Sister
Turret
Security Camera
Security Bot
If you have taken a photo of each of these before you get to Fort Frolic, not including the Bouncer, the trophy will unlock once you take a picture of the Bouncer in Fort Frolic.