The white grouper (Epinephelus aeneus) is a species of marine ray-finned fish, a grouper from the subfamily Epinephelinae which is part of the family Serranidae, which also includes the anthias and sea basses. The white grouper is found in the subtropical eastern Atlantic Ocean and the southern Mediterranean Sea. The white grouper has a head which is longer than its body is deep, the standard length being 3 to 3.6 times the depth of the body. The dorsal profile is convex between the eyes. The preopercle is angular and has with 3 to 6 large spines at its angle, the lowest being directed downwards. The dorsal fin contains 10-11 spines and 14-16 soft rays while the anal fin has 3 spines and 7-9 soft rays. The caudal fin is rounded and the body is covered in small scales which are set within thick skin. There are over 90 scales in the lateral line. The overall colour is greenish bronze with darker fins which are brownish purple and have white or pale margins. There are 3 or 4 pale blue or white lines across the gill cover, these can be quite faint in larger adults. The juveniles have faint dark spots on their body which create 5 indistinct dark vertical bars. The juveniles also have indistinct dark spots on the fins. The maximum total length this species has been recorded at is 120 centimetres (47 in), although they are more common at around 60 centimetres (24 in), and the maximum published weight is 25 kilograms (55 lb). The white grouper is found in the eastern Atlantic Ocean from southern Portugal and southern Spain south along the western coast of Africa as far south as Angola, including the islands in the Gulf of Guinea. Its occurrence in the Canary Islands and Madeira needs to be verified. It is found in the southern and eastern Mediterranean but appears to be expanding its range northwards being formerly absent north of 44°N in the Adriatic Sea and to be absent from the central Mediterranean but there have been records from Corsica and Monaco, among other recent northerly Mediterranean Sea records. There is a history of vagrancy in this species and the synonym Perca robusta was based on a specimen taken in Cornwall in southwestern England.
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