Claudio Contreras / Giant Manta Ray (Manta birostris), San Benedicto Island, Revillagigedo Archipelago Biosphere Reserve (Socorro Islands), Pacific Ocean, Western Mexico. Vulnerable species.

Felis Images / Short fin mako shark (Isurus oxyrinchus) head discarded on ground, fins were dispatched for export and remaining meat cubed for sale locally. Negombo Fish Market, Sri Lanka. 2017. Photo Vydhehi Kadur/...

Felis Images / Rays (Mobulidae) caught as by-catch, in basket. For sale at Negombo Fish Market, Sri Lanka. 2017. Photo Vydhehi Kadur/Felis Images

Felis Images / Fisherman removing Shark (Elasmobranchii) pectoral fins. Negombo Fish Market, Sri Lanka. 2017. Photo Vydhehi Kadur/Felis Images

Alex Mustard / A split level image of Southern stingray (Hypanus americanus) swimming over a sand bar. Grand Cayman, Cayman Islands. Caribbean Sea. Digital composite.

Richard Robinson / A Blue shark (Prionace glauca) just below the surface, with nictitating membrane partially shut to protect its eye, Hauraki Gulf, Auckland, New Zealand, June.

Henley Spiers / Munk's devil rays (Mobula munkiana) juveniles, feeding on plankton at night, attracted to the green light hanging from a boat, Espiritu Santo Island, Baja California Sur, Mexico, Pacific Ocean.