If you can get me the latin name for the individuals you have at your lfs, i can probably be of more help. Right now i can get you some general info about anglerfish (also called frogfish)
of the family Antennariidae. As you know these fish will take up their niche on the aquarium floor and not move much. Depending on the species, they can be from 2 to 15 inches in length. As far as the appropriate tank set up goes, this will be varied by species. Some live in shallow reefs while others can be found to depths of up to 45m. i would strongly advise against any of the deep water species. My reasons for this is while being collected they are pulled up through a great difference in water pressure quite rapidly which will have negative (possibly life threatening) results which may not be apparent during purchase time.
You will need to provide cover (LR...ect...)
and if at all possible something that matches the angler's cryptic coloration. this will greatly help with acclimation and feeding. As far as feeding goes anglers have the fastest feeding response of all vertebrates. one source notes up to 1/4000 of a second. They can eat fish longer than their own bodies so be careful with tankmates. When feeding it helps to move the food around the fish as it is alive. Anglers may be territorial depending on species, tank size..ect... feed small fish, shrimp, shellfish meat, and squid. pieces of beef heart can also be offered but i wouldn't feed too much of this.
anyway, this is about all the info (without getting overly scientific) i can give you without knowing the exact species. hopefully this helped a little...
