in New Zealand waters
are two main groups of pelagic fish Oceanic
fish undergo long migrations and consequently
have wide distributions. Marlins and tunas are
typical examples, usually found beyond the continental
shelf in clear blue oceanic water.
and tunas migrate southwards to New Zealand during
the summer and autumn. At least four Indo-Pacific
species of tuna visit our shores.
warm-water oceanic species which occur seasonally
are the southern mackerel, dolphin (not to be
confused with the marine mammal of the same name),
flying fish, and large sharks, such as the thresher,
mako, and tiger sharks.
is an example of an oceanic species characteristic
of cooler waters, occurring also in southern Australia,
South Africa, and South America. It is distinct
from the tropical aggressive barracuda, which
is not found round New Zealand.
fish also migrate in response to seasonal water-temperature
changes or to spawning stimuli, but they stay
close to land and do not travel the vast distances
of the oceanic species.
are kahawai, trevally, jack mackerel, and kingfish