O.K., I cheated and did some searching - the first fish is probably Blepsias cirrhosus or a closely related species - a type of sculpin.
For the butterflyfish - what other species was it in with? Most public aquariums have regional exhibits - so you can usually figure out what ocean the fish came from if you know its tankmates. For example, if the damsel and the butterflyfish were in the same tank - then you probably saw a C. dolosus. If the butterflyfish was in with say, a french angle, then it would probably be a C. sedentarius.....
Jay