The vast majority of living fishes are predatory. Of some 1100 species of extant elasmobranchs, only 13 (1.2%) – the basking shark (Cetorhinus maximus), megamouth shark (Megachasma pelagios), whale shark (Rhincodon typus), manta ray (Manta birostris), and about nine species of devil rays (genus Mobula) – have forsaken the actively …
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