blue shark swimming in shallow waters

animal atlantic beautiful behavior biodiversity blue cape chum coast cod conservation cruises dangerous dark diverse diving dorsal ecosystem england environment feet fin finning fishing glauca habitat healthy hearing hydrodynamics jaws length massachusettes migrate migrating migration new niche ocean olfaction pectoral predators predatory prionace research scary science sea seascape senses shallow shape shark sight sleek smell snorkeling species sunlit swimming teeth temperate tourism travel tropical underwater vision water waters world