Bioerosion, Figure 1 (a) Endolithic algae inhabit the skeletons of corals, living amongst the crystals and over time weakening the
skeleton. (b) Dead coral substratum covered by turf algae (photo: O. Hoegh-Guldberg). (c) In situ dead coral habitat split open to
reveal boring sipunculans and bivalves, burrow of boring bivalve (photo: P. Hutchings). (d) The grazing echinoid Echinometra
mathaei, oral surface showing Aristotle’s lantern partially protruding from the mouth that it uses to actually scrape off the surface of
the coral (photo: A. Miskelly). (e) Diagram of Aristotle’s lantern (Illustration after Anderson, 1996). (f) Diadema setosum a grazing
echinoid linked to major erosion of western Indian Ocean reefs (photo: O. Hoegh-Guldberg). (g) Echinostrephus sp., sitting in its home
scar that it has eroded (photo: O. Hoegh-Guldberg).
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skeleton. (b) Dead coral substratum covered by turf algae (photo: O. Hoegh-Guldberg). (c) In situ dead coral habitat split open to
reveal boring sipunculans and bivalves, burrow of boring bivalve (photo: P. Hutchings). (d) The grazing echinoid Echinometra
mathaei, oral surface showing Aristotle’s lantern partially protruding from the mouth that it uses to actually scrape off the surface of
the coral (photo: A. Miskelly). (e) Diagram of Aristotle’s lantern (Illustration after Anderson, 1996). (f) Diadema setosum a grazing
echinoid linked to major erosion of western Indian Ocean reefs (photo: O. Hoegh-Guldberg). (g) Echinostrephus sp., sitting in its home
scar that it has eroded (photo: O. Hoegh-Guldberg).
BIOEROSION
141