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Ocellaris Clownfish (Amphiprion ocellaris)
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Description: The Ocellaris Clownfish, Clownfish or False Percula Clownfish (Amphiprion ocellaris) is very closely related to A. percula, the Orange Clownfish or True Percula Clownfish & often lives in association with the sea anemone Heteractis magnifica, using them for shelter & protection. Ocellaris clownfish are hardier & slightly less aggressive than its Percula counterpart. Both species are found in coral reefs of the Indo-Pacific, particularly in the Fiji & Tonga regions. This clown anemonefish can be recognised by its orange colour with 3 white bars & black markings on the fins. It grows to about 8 cm (3 in) in length. One can differentiate between Percula (true) & Ocellaris (false) by their respective colors & patterns. Ocellaris are usually less vibrantly colored & have 11 dorsal fin-spines instead of 10, as on the Percula. Also, the species have different eye arrangements: Percula have bright orange irises, making their eyes appear smaller, whereas Ocellaris have grey/orange irises which make the species eyes appear bigger.There is a rare melanistic variety hailing from the reefs around Darwin, Australia, that is a darker color with the normal white stripes. All fish have a mucus membrane surrounding their scales. The mucus usually contains high amounts of lipids & glycoproteins; however, the family Pomacentridae (anemone fish) have a special adaptation where the mucus coating the species is a great deal thicker. Also the protective layer lacks a specific substance that triggers nematocysts (the stings of an anemone); this allows the fish immunity against the toxic stings. Little is known about the mucus except that it is a genetically inherited trait & passed through the generations of each species. In other families of fish, the mucus is used as protection against harmful bacteria, an osmotic regulator & also aids the fish in nest making. The difference in mucuses has led to the divergent path of anemone fish & other species.
Uploaded By: femcat38
Date: 12/10/2011
Views: 293
File Size: 76 KB
