Redlip Blenny (Ophioblennius atlanticus: Feeds on vegetable matter, including frozen and dried foods containing marine algae and the blue-green alga Spirulina. Does best if a crop of nmicroalgae (its natural source of food) is growing in the aquarium. Minimum tank size 20 gal. May nip at stony corals and clam mantles. Will spend much of its time perching on the aquascaping, hopping from rock to rock and picking at the substrate. Usually ignored by its tankmates, but may behave aggressively toward members of its own species, closely related forms or any fish that enters its territory. Large specimens can be very territorial, especially in smaller aquariums. Keep singly or in a male-female pair.
Atrosalarias fuscus - known as Highfin Blenny, Brown combtooth Blenny: As above except minimum tank size 55 gal.
Info taken from "A PocketExpert Guide Marine Fishes"
I wouldn't mix the two if that is also what you're asking!
HTH