Megamouth shark to be the sole extant species in the distinct family Megachasmidae, though suggestion has been made that it may belong in the family Cetorhinidae, of which the basking shark is currently the sole extant member. Researchers have predicted the feeding patterns of megamouth sharks in relation to the other two planktivorous sharks; the three plankivourous sharks have ram feeding in common, as it evolved from ram feeding swimming-type ancestors that developed their filtering mechanism to capture small prey like plankton. In addition to the living "M. pelagios", however, two extinct megamouth species – the Priabonian "M. alisonae" and the Oligocene–Miocene
Fish drum Fish drum The fish drum () is a Chinese percussion instrument. The name actually designates two rather different instruments, a membranophone and an idiophone. The membranophone fish drum is the symbol of Elder Zhang Guo, one of the Eight Immortals. This drum is a long and slender piece of bamboo with a dried fish skin stretched over one end. Two smaller pieces of bamboo resembling golf clubs are used as Castanets. There is also the idiophone, which is also called a wooden fish. This type of fish drum is used to accompany performers of "changben" or Chinese narrative ballads. They