Entacmaea quadricolor, Bulb, Bubble-Tip or Maroon Anemone, RBTA - Tentacles inflated at tips, with white band and pink tip (usually). Red or pink form called Rose Anemone. Attaches to hard surface."In nature hosts Maroon and Bluestrip clownfishes. In aquarium will also host Bubble tip Anemones are the natural host for many popular clownfish species including clarki, tomato, saddleback, skunk, melanopus, bicinctus, ephippium, rubrocinctus, and maroon clowns ocassionally ocellaris, percula, and other clownfish in captivity."
Can be propagated in captivity. The best choice for hobbyist aquariums.
Clownfishs by Wilkerson states:
Amphiprion akindynos, Barrier reef Clownfish
A. Allardi, Allard's Clownfish
A. bicinctus, Two-Band clownfish
A. chrysopterus, Orange-fin Clownfish
A. ephippium, Red Saddleback Clownfish
A. frenautus, Tomato Clownfish
A. mcculloghi McCulloch's Clownfish
A. Rubrocinctus, Australian Clownfish
a. tricinctus, Three-band Clownfish
Premnas biaculeatus, Maroon Clownfish
In captivity (but not in nature) it also hosts:
A. ocellaris, Ocellaris or False Percula Clownfish.
You should have an amount of liverock that an E.Quad can climb onto in order to reach more light if it so chooses. This might mean about 2/3 up the water column.
A 55 gallon aquarium would offer a much better home and stability for a Bubble tip anemone.
Thomas