Species found in El Tanque (max. depth 26 m):
Threespot damselfish (Stegastes planifrons)
Garden eel (Heteroconger longissimus)
Barred hamlet (Hypoplectrus puella)
Sharpnose puffer (Canthigaster rostrata)
Yellowhead wrasse (Halichoeres garnoti)
Blue chromis (Chromis cyanea)
Blackcap basslet (Gramma melacara)
Yellowfin mojarra (Gerres cinereus)
Creole wrasse (Clepticus parrae)
Yellowhead jawfish (Opistognathus aurifrons)
Schoolmaster (Lutjanus apodus)
Masked goby (Coryphopterus personatus)
Sand diver (Synodus intermedius)
Stoplight parrotfish (Sparisoma viride)
Bluestriped grunt (Haemulon sciurus)
Houndfish (Tylosurus crocodilus)
Indigo hamlet (Hypoplectrus indigo)
Great barracuda (Sphyraena barracuda)
Bluehead (Thalassoma bifasciatum)
Blue tang (Acanthurus coeruleus)
Bandtail puffer (Sphoeroides spengleri)
Zoanthid (Zoanthidea)
Knobby sea rod (Eunicea)
Corky sea finger (Briareum asbestinum)
Grooved brain coral (Diploria labyrinthiformis)
Orange icing sponge (Mycale laevis)
Azure vase sponge (Callyspongia plicifera)
Scattered pore rope sponge (Aplysina fulva)
Stove-pipe sponge (Aplysina archeri)
Pitted sponge (Verongula rigida)
Yellow tube sponge (Aplysina fistularis)
Tubular thicket algae (Galaxaura)
Flamingo tongue (Cyphoma gibbosum)
Banded coral shrimp (Stenopus hispidus)
Yellowline arrow crab (Stenorhynchus seticornis)
