Megamouth shark to more than half the worldwide total. Specimens have also been sighted in or come out of the waters near Hawaii, California, Mexico, Indonesia, Australia, Brazil, Senegal, South Africa, Puerto Rico, Ecuador, and possibly Vietnam. On March 30, 2009, off Burias Island in the Philippines, an 880- to 1,100-pound (400- to 500-kg) megamouth shark died while struggling in a fisherman's net and was subsequently taken to nearby Donsol in Sorsogon province, where it was examined by scientists, before being butchered and sold. On June 12, 2011, a 3-m (10-ft) dead juvenile male was found by fishermen near the western Baja
Fish anatomy gonads). Much like the mammalian immune system, teleost erythrocytes, neutrophils and granulocytes are believed to reside in the spleen whereas lymphocytes are the major cell type found in the thymus. In 2006, a lymphatic system similar to that in mammals was described in one species of teleost fish, the zebrafish. Although not confirmed as yet, this system presumably will be where naive (unstimulated) T cells accumulate while waiting to encounter an antigen. Fish anatomy Fish anatomy is the study of the form or morphology of fishes. It can be contrasted with fish physiology, which is the study of how the