A Review of the Thresher Shark, Fox Shark or Sea Fox in Yorkshire water

摘要

Classification, distribution and life history. The shark order Lamniformes or mackerel sharks include seven living families, one being the thresher sharks, recognized by an extremely elongate dorsal lobe of the caudal fin, which approaches the lengthof the trunk of the body. Currently there are three named species, the Common Thresher Alopias vulpinus (Bonnaterre), the Bigeye Thresher Alopias superciliosus (Lowe) and the Pelagic Thresher Alopias pelagicus Nakamura plus a fourth as yet undescribed taxon known only from allozyme enzyme analysis (Eitner, 1995; Compagno, 2002).