An oceanic whitetip shark
patrols the deep ocean
water off the reef in the Red
Sea, Egypt. The species is
endangered and subject to
fishing pressure throughout
its range. The pilot fish
following the predator feed on
ectoparasites found on
the shark’s body.A tiny 10mm pygmy seahorse
shelters in a Red Sea fan in
the Molucca Sea, Indonesia.
This small marine fish only lives
on one species of Muricella
sea fan and will spend its life
concealed between the polyps.81 April 2017Alex Mustard is an award-
winning underwater
photographer and co-author of
Secrets of the Sea: A Journey
into the Heart of the Oceans
(Bloomsbury). See more his work
at http://www.amustard.com
April 2017 73