Page 29 - Shark

Anchor which embeds
pilot fiSh
in eye’s surface Young golden trevally from the Pacific
Arm Ocean swim with larger fish, including
sharks. Though they are called
pilot fish, they do not guide
Head sharks and other large
fish to sources of food,
Trunk but just like to school
with larger fish.
Also, they may gain
protection because
other fish do not
like to be close to
Egg sac, sharks. Pilot fish
containing are much too
thousands agile to be eaten
of eggs themselves.
moBile home Tentacle
Whale sharks (top) are so big that they provide living space Head
for large numbers of remoras. Some remoras congregate
around the mouth, even swimming inside the mouth eye Spy
cavity and gills, where they may feed on parasites, while This strange copepod
others nestle around the cloaca on a female shark (above). hangs by its arms
Remoras get free transportation from their giant hosts, to a Greenland
either by clinging on or riding the shark’s bow wave. shark’s eye. At
Body 11¼ in (31 mm)
long, the parasite
wormS and more wormS makes it hard for
Hundreds of 1-ft (30-cm) tapeworms may live in a shark’s gut a 20-ft (6-m) length
where, attached by spiny tentacles, they absorb food. Segments full shark to see. It feeds navigating
of eggs from their tail ends are passed into the sea and the eggs on the eye’s surface A large ship is guided into harbor by pilot boats, but
hatch when eaten by a copepod. A young worm is passed on when tissues, butonce there, sharks navigate on their own (pp. 18–19).
a bony fish eats the copepod, and then a shark eats the fish. it cannot let go.