Megamouths are large sharks, able to grow to in length. Males mature by and females by . Weights of up to have been reported. Megamouth sharks can be found as far northward as northern Japan; southern California (LACM 43745-1) and near Punta Eugenia, Baja California; Hawaii. Occasional off California. Length to at least 5.75m (18.9 ft) TL. Depth: surface to 1,000m (3,280ft). Megamouth sharks have a color of Dark blue, brownish-black, or gray above, lighter below; white band along upper jaw; posterior margin of fins white. Vert. 139–151.