Useful information The Surgeonfish outstanding characteristic is the lance like spines or keeled bony plates, one or more on either side of the tail which are dangerously sharp difference upon family. Some of them be able to spread and fold like pocket knife. The thorn tails has venom similar to Lion fish and Estuarine stonefish but Surgeonfish’ toxicity with a smaller resultant value indicating a higher level of toxicity from Lion fish and Estuarine stonefish. There are have incisiform teeth in single row both of upper and lower teeth used for grazing on food. Surgeonfish is diurnal animal, they are grazing algae coating on coral. The Surgeonfish’s grazing algae coating on coral makes the coral photosynthesis and healthy. Thus, Surgeonfish has more importance for the ecology.