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The black sea urchin, also called a long-spined sea urchin, is the most abundant and important herbivore on the coral reefs of the western Atlantic and Caribbean basin. When the population of these sea urchins is at a healthy level, they are the main grazers which prevent algae overgrowth of the reef.
Diadema antillarum (black sea urchin)
Illustration of Acanthaster planci (Crown-of-Thorns starfish), which preys on corals.
Acanthaster planci (Crown-of-Thorns starfish)
Illustration of a holothurian or sea cucumber.
Holothurian 1
Illustration of Linckia laevigata (Blue Linckia)
Linckia laevigata (Blue Linckia)
Illustration of Lytechinus variegatus (Variegated Sea Urchin)
Lytechinus variegatus (Variegated Sea Urchin)
Front view illustration of a Long Spined Urchin. It is found in the Indo-Pacific region, in dark reef up to 30 ft deep. It is active at night, hiding in crevices or under rocks at night..
Echinothrix diadema (Long Spined Urchin)
Illustration of Pteraster tessalatus (Cushion Star)
Pteraster tessalatus (Cushion Star)
Illustration of Pycnopodia helianthoides (Sunflower Seastar)
Pycnopodia helianthoides (Sunflower Seastar)
Illustration of Daisy Brittle Star (O. Aculeata)
Ophiopholis aculeata (Daisy Brittle Star)
Illustration of a second Holothurian
Holothurian 2

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