Why does a crayfish swim backwards

Now she is herself. From now on she should be more active. Younger crayfish are more crazy about running around the tank mine started at 1" and she grew to 6" and ate the male.

They are less active as adults but still its normal for them to climb everything. Well that is some good news. She is about " and yes, has molted She certainly does seem to be having fun. The fish are all looking at her with odd interest trying to figure out what the heck she is up to but so far they are all holding their own. I"ll keep my fingers crossed that she has finally decided that she is going to be an active participant of the tank.

Aug 23, 0 0 29 Hastings, NE. I had him since he was 1" and he ate tubifex worms whole, shrimp pelets, and his favorate and mine were algea disks. I think your cray might be sheading.

If it is curuling its tail back and swimming backwards thats probably it. Oct 31, 0 0 In your nightmares. My crayfish is the largest and most active inhabitant of my tank, climbs plants, swims, crawls all over everything.

That said If you're cray is abnormally active, it may be trying to escape because something is making it uncomfortable, water quality, parasites, temperature, etc. Does the shell look abnormal at all? Are there any aggresive fish that nip at his antennae? See if there's anything physically off about him. I have heard that before crays molt they "itch", I have also noticed that the shell will get more opaque you can only notice by looking at the eyes on mine which cloud up a little right before molt.

Any of these symptoms? To keep those movements in the right sequence, the animal's nervous system has to integrate signals from each of these different segments as well as signals from the brain. Mulloney's group, working with mathematicians Stephanie Jones at Harvard University and Frances Skinner at the University of Toronto, built mathematical models of the crayfish nervous system to see how they might work.

They used those models to design experiments where they recorded impulses in crayfish nerves. They showed that the swimmeret system is made up of eight modules of 70 neurons each. They found which neurons are necessary to complete the circuit, and what cells they connect to. As the swimmerets beat, each module receives a stream of nerve impulses from the modules behind and in front of it. Signals from behind indicate a power stroke; those from the front represent a recovery stroke. Mulloney's team has found that those different messages converge on the same target neuron, which integrates them into a graded, non-spiking signal.

This combined signal tells the module when to release neurotransmitters -- chemicals which change the timing and force of limb movement. Materials provided by University Of California - Davis. Europeans consider crawfish a delicacy.

So, do we. Crawfish are not fish. They are crustaceans like shrimp, crab and lobsters. A quarter pound of crawfish contains 82 calories. They are also a great source of protein. Crawfish can shed molt their shells up to 15 times and they double in size with each molt.

Crawfish are also called crawdads, crayfish and mudbugs. See you there!