The Supreme Predator
Orca whales have no natural
predators as adults. They are the ultimate predator in the
ocean, even beating out sharks. Because they are at the top of
the food web, their diet consists of almost anything you can think
of: fish, porpoises, seals, dolphins, sea lions, sharks, whales,
birds, sting rays, turtles, squid, etc. One tool that they utilize
to find their prey is echolocation. Echolocation is a series of
high frequency pulses sent out into the water. When the pulses hit
something, they bounce back to the Orcas, allowing them to interpret
what is going on around them. They hunt together in their pods,
they also use noises generated in their nasal cavities to
communicate with each other to plan out their attacks.
Transient Orcas feed almost
completely on warm blooded mammals. They target the weakest member
of the group. They make long dives to probe up and down the
shorelines, stalking their prey. Because their prey are
generally good hunters too, transients use less vocal communication
so that the prey does not get scared away. There are many ways
that they can kill prey of all different types, but most commonly
they like to completely surround their prey until it has no
opportunity for escape. They then take turns ramming the victim
with their heads, taking large chunks of tissue and blubber out with
their teeth. They also use their flukes to throw their prey
around. Orcas are extremely good swimmers and can often out swim
their prey to tire them. Transients attacks are often
Resident Orcas
feed primarily on fish. Residents make shorter dives.
Because their prey is hard to corner, they need to communicate much
more to organize the attack. They often surround the fish and
herd them into a large ball. They then take turns diving into the
ball of fish to catch and swallow them.
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