Читать книгу Clinical Guide to Fish Medicine - Группа авторов - Страница 37

Pelagic sharks share a similar, hydrodynamic body shape, e.g. requiem sharks (Carcharhinidae) and ground sharks (Triakidae). Epibenthic, benthic, and demersal sharks typically have large heads, more caudal dorsal fins, and lower tail angles, e.g. carpet sharks (Orectolobiformes). The batoids (skates [Rajiformes] and rays [Myliobatiformes and Torpediniformes]) and sawfish and guitarfish (Rhinopristiformes) show dorsoventral flattening of the body and enlarged pectoral fins. Chimaeras (Holocephali) show lateral compression and undulate their pectoral fins rather than their axial body.