DescriciónMillepora alcicornis (branching fire corals) (San Salvador Island, Bahamas) 2 (15464096583).jpg
Millepora alcicornis Linnaeus, 1758 - branching fire corals in a patch reef.
The tan-colored structures are calcareous skeletons of colonies of hydrozoan polyps. They are not true stony corals - fire corals are hydrozoans while true stony corals are anthozoans. Nematocysts in the tentacles of the small polyps deliver a painful sting.
The skeleton of Millepora alcicornis has a complexly branching skeleton. Another species, Millepora complanata, also occurs in patch reefs around San Salvador Island - it's skeleton has a wrinkled bladed form. The overall skeletal shape of Millepora alcicornis is often a consequence of the fire coral encrusting octocoral skeletons.
The spotted fish in the lower right corner is Lactophrys triqueter (smooth trunkfish).
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