f000919: three crayfish packed like sardines in a tin, in
order to fit the space available.
f010720: crayfish city. [A6]
f006102: a large crayfish tagged with an acoustic pinger,
for the purpose of discovering how crayfish migrate from day to day and
seasonally. When this cray moults, it also loses its tag. [A6]
f015728: closeup of the mandibles of a crayfish.
f003505: sights like this makes many believe that crayfish
have died, often in mass suicides together. The reality is, however, that
they need to shed their skins in order to grow. All crustaceans live inside
boxes called exoskeletons, whiich are hard and cannot grow.
charonia eating cray moult
f010725: quite against intuition, females choose the bucks
of their liking. Here they can be seen holding on to their dream boys,
which are much larger. It may well be advantageous to crayfish populations
if fishermen let the large ones escape.
f214312: A spanish lobster was caught in the act of moulting.
Here the animal is seen leaving its old shell. First it draws itself out
of the chest part, leaving the old skin around its feelers, eyes and even
gills in tact. Then it shakes its tail part off in a single flick, which
it is just doing now. Prior to moulting, the animal refuses food for two
weeks, and a whole week after the event likewise, because its skin (and
mouth parts) is still too weak for chewing.
f020219: the banded coral shrimp is an endearing creature.
With its six long antennas and gaudy colours, it announces its presence
to passing fish. In the tropics these shrimps jump onto a visiting fish
in order to cleanse it from parasites. However, in New Zealand they are
less occupied in this kind of trade.
f030422: banded coral shrimps are often found in pairs, and
they can be found inside the same crevice for many years. Here are two
of them, a spaghetti junction of white antennas.
f020222: With its swimmerettes underneath its abdomen, a
coral shrimp swims stately and purposefully through the water. This photo
shows its weird anatomy. The five pairs of legs, counting from the rear,
are: leg, leg, claw, nipper, nipper. This is quite unusual for crustaceans.
f013929: the common shrimp in New Zealand (Palaemon affinis)
is a keen swimmer, being able to swim both forward and backward with ease.
Its four long antennas give it early warning of impending danger. With
its little nippers it cleans many organisms in exchange for food.
f028916: camouflage or decorator crabs occur in several species.
They are the most secretively living of all crustaceans. Here is one, dressed
up in the organisms of its surrounding. [A4]
f028920: the same crab on an orange boring sponge. [A4]
f017330: killer prawns are light-shy nocturnal inhabitants
of the sheltered reef. They are extremely skittish and hard to photograph.
No more than 5 cm long, mature and fully grown, this killer prawn has climbed
an orange finger sponge. It is not known what they eat, but their name
is probably wrong. [A6]
f028925: a crustacean of the shovelnose type, related to
spanish lobsters and killer prawns,, moves slowly in a garden of miniature
red seasquirts. [A4]