What is Megamouth shark?
{{Taxobox | name = Megamouth shark | status = DD | status_system = IUCN3.1 | image = Megamouth_shark_japan.jpg | image_caption = A preserved specimen | regnum = [[Animal]]ia | classis = [[Chondrichthyes]] | subclassis = [[Elasmobranchii]] | ordo = [[Lamniformes]] | familia = '''Megachasmidae''' | genus = '''''Megachasma''''' | range_map = Megachasma pelagios distmap.png | range_map_width = 250px | range_map_caption = Range of the Megamouth shark (in blue) | binomial = ''Megachasma pelagios''}} The '''megamouth shark''' (''Megachasma pelagios'') is a large, slow-swimming, timid [[shark]] that was only discovered in 1976. It grows to 5.5 metres long. The megamouth is found in the [[Indian Ocean|Indian]], [[Atlantic Ocean|Atlantic]], and [[Pacific Ocean]]s. == Description== The megamouth shark has a sturdy body, and a fat, round and long head. The snout is very short and wide. The [[gill]] slits are quite long but can not reach the dorsal surface of the head. The mouth is wide, with the corners extending behind the [[eye]]s. The first [[dorsal fin]] is located more closely to the [[pectoral fin]]s than to the [[pelvic fin]], and the second dorsal fin is less than half the size of the first dorsal fin. Both dorsal fins are low. The [[pectoral fin]]s of the adults are shorter than the head in length. The dorsal surface of the body, the pectoral and [[pelvic fin]]s, the [[dorsal fin]]s, the center of the [[anal fin]], and the [[caudal fin]] are blackish-brown. The belly is white. The shark has around fifty rows of very small [[teeth]] on each [[jaw]], but only three rows are usable. Females seem to have fewer teeth rows than males. The upper and lower jaws have a symphyseal (where the two halves of the jaw meet) toothless space, but it is larger in the upper jaw. A difference between the upper and lower teeth was recognized on a female specimen: the first five upper teeth are smaller than the first five lower teeth. The maximum length reported for the Megamouth shark is 5.5 metres (18 feet). Males mature when they