SEA URCHINS
DIADEMATIDAE
Slatepencil Urchin
Eucidarus tribuloides
Size
To 5 cm across the test (body)

Description
:
Thick, blunt spines, reddish white with reddish brown banding, often encrusted appearing grey. Short white secondary spines.

Ecology
Nocturnal, wedging itself inside crevaces during the day. Feeds on algae, bryozoans, sponges and tunicates. Lives on reefs and seagrass beds to 150ft (50m).

Life Cycle
Reproduction in E. tribuloides seems to be sensitive to both seasonal cycles and the lunar cycle.
    Ecological Descriptors
Habitat Size (cm) Diet Behaviour Sex 
Co, R, S 5
(body)
Veg, Spo, Bry, Tun Noct I F
Slatepencil Urchin
SYNONYMS:
Mine Urchin
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