Ocean sunfish

Ocean sunfish (public domain)

The ocean sunfish (Mola mola) has an oval, gray to brown body with elongated dorsal and anal fins. Its caudal fin is replaced by a so-called clavus. Mola mola can reach 2 meters (6.6 feet) in length and weights up to 1000 kg (2200 lbs). Despite its size the ocean sunfish is harmless to divers. It feeds mainly on sea jellies. Sunfish are sometimes seen basking on their sides near the water surface.

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This supplemental online resource accompanies the book Scuba Diving Hand Signals by Lars Behnke, available on Amazon.