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Ocean sunfish (Mola mola)
Subject: Ocean sunfish (Mola mola)
Poster: Shahril (
Ocean sunfish.jpg
Resolution: 407x612 File Size: 66013 Bytes Date: 2018:11:22 07:46:23 Upload Date: 2018:11:22 09:55:49

Ocean sunfish (Mola mola)

Not only is the ocean sunfish the world’s heaviest bony fish, with some individuals weighing in at a staggering 2.3 tonnes, but it also possesses a truly bizarre body shape, likened to a gigantic ‘swimming head’. The ocean sunfish has no tail, with the caudal fin reduced to a rudder-like structure, called the clavus. The dorsal and anal fins are placed far back on the body, and are used as ‘oars’ in swimming (the fins are flapped synchronously to propel the fish through the water). The ocean sunfish does not have scales, and instead has a tough, elastic skin which is covered in mucus. Also unlike other fish, it has fewer vertebrae, lacks bony tissue in the skeleton, and does not possess ribs, pelvic fins or a swim bladder. The mouth of the ocean sunfish is small, and its teeth are fused together to form a ‘beak’. The ocean sunfish tends to be brownish-blue to silver in colour, often with a slightly iridescent sheen, and it may also exhibit various patterns on the skin.

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