Author	Topic:   Question
Sean	posted 9/19/06 1:29 AM       I just bought a Yabbie blue and i put him in my tank where i previously had a brown one. My new Blue crayfish is turning brown... Why is this happening? is it a sign of something? or is it because the pebbles in the tank are brown and red? when i bought him he was bright blue and after 2 days he is pretty much all brown. Please send reply to Seanmounce@hotmail.com as i don't check here often. ps i feed it sinking shrimp pellets, its a 10gallon tank with a filter waterfall for air.
Jamie	posted 9/20/06 1:26 PM       hmmm sounds weird, when i caught my Murray Cray he was light brown and after he malted which was around 8 months after i got him he had a bit of a new colour in his shell it had alot more blue and purple in it and his claw changed from the dirty look to pure shiney white, i had a brown yabbie -(now dead, my cray got his revenge from a claw incedent a while ago)- that turned blue over a period of 3 months but i've never heard of it happening in a matter of days without malting, i suggest you wait for someone with a bit more crayfish knowlege to ansewer your question. sorry i couldnt help
yabmeacrab	posted 1/10/07 7:42 AM       Hi Sean, I know its been awhile since you asked the question why your blue yabby turned brown. I am a yabby lover and breeder. I would like to give you some insit as to why you yabby changed colour. As you were already told malting can cause a yabby to change colour this can happen either before as the outer shell is getting ready to shed or after a yabby has shedded if this is the case a yabby can often be a very light blue or a very bright blue but as the shell begins to harden which can take up to 5 days it may begin to change to a darker colour or as in your case change from one colour to another. So it could be possible that your yabby had very recrently shed before you purchased him. Another possilble factor is genetics, your yabby may have one brown parent one blue what can happen is a yabby will be blue then as it matures and becomes ready to reproduce it may change to a brown or green colour, after breeding or shedding again they might change back to a blueish colour which may have already noticed. Colouring of stones and gravel wont change your yabbies colour. Just make sure you have penty of stones for them to dig in and rocks or wood for them to hide under, wood is good as they will eat bacteria from it, however it can make the water turn brown. I have 4 tanks dedicated to yabbies, in 2 of them I have put lego pirateships. The lego looks good and you can make what you wish, the yabbies love hidding in it climbing on it.I hope this was of some help and if there is anything else you would like to know just ask..
Adam	posted 3/22/07 5:20 PM     It could also be because of stress. Usually the minimum tank size for a crayish is 20-30 gallons and you only have a 10 gallon tank. So you might want to consider that. It could also be that he doesn't like the food. Try giving him something like carrots, raw potatoes, lettuce, or frozen peas once in a while.
jordan	posted 7/13/07 0:42 AM       me and my sister recently got a yabbie each, my sisters seems to be eating reguarly but mine seems to only take small bites evrey now and then, is this normal for when a yabbie is introduced to a new habbitat?
john	posted 11/22/07 1:14 AM     how do i know if boy or female crayfish?
Tom	posted 11/28/07 4:06 AM     The males have rad on the claw
john	posted 12/9/07 5:02 PM       wtf is rad because mine has just blue clays everything blue?
Darkness-Angel	posted 12/14/07 7:29 AM     Hi. To I have just started out with yabbies, but my family enjoy eating them as well. As we get some from the wild. I saved a really littel one I found and have had it for a few months now. It is still brown. I was wondering how long it will take to turn blue. It was about 2cm when I got it, and is now about 8cm.
Darkness-Angel	posted 12/14/07 7:30 AM     Oh, and to tell the difference between male and female. Females have a double set of legs. This is so they can carry their eggs.
john	posted 12/16/07 6:46 PM     it should take a month or more to get there colour.oh ya ty for the info im shure mines a female because female have kinda fat claws and males have long claws
Ben	posted 12/23/07 4:58 AM     While it probably will, it's possible your yabby may not change colour. For sexing yab's, the female's have a wider tail and 2 little holes at the base of her 3rd set of legs. The males have 2 little appendages on their last pair of legs...like little doodies and ginies
john	posted 12/23/07 7:17 PM     thanks dude i will look and etc..... i now now that mines a female because mine has thick fat claws and males have long.
cheese	posted 1/6/08 2:58 PM     man could you guys make it easier to understande if a crayfish is male or female for a 14 yr old
john	posted 1/6/08 3:27 PM     MALES HAVE LONG THICK CLAYS FEMALES HAVE FAT CHUBBY CLAWS
cheese	posted 1/6/08 10:46 PM     and i catch my crafish in a creek by my school and there just like plain brown and some have little orange on them..and i dont know what kind these may be and i live in maryland that might help
cheese	posted 1/6/08 11:05 PM     plus could 1 of you guys tell me a well suited size of tank for crayfish because i have mine in a 20 gallon wide tank and like blue green and white rocks with a lego house in one side of the taank and a rock with like a tunnel in it
john	posted 1/13/08 2:59 PM     still going at it ah cheese.
bec	posted 5/3/08 6:40 AM     males have red on the tip of their claws an females are blue it doesnt matter the thickness of the claw as this can be just a different breed of yaabie as i have 3 types an the males has quite a thick claw! an it really doesnt matter what size tank you have as long as its reasonable(not too small)yabies can live up to 5 years in captivity or maybe even longer as mine are 5 now an the size of a lobster. they feed of scraps of vegies an they love pellet fish food .
bec	posted 5/3/08 6:43 AM     oh an i forgot to say yabbies do change colour if you dont have enough light for them or the because of the condition of the water.ieg dam yabbies are brown because of the brown water. river yabbies are usually blue in colour because of the clearity of the water
yabbyman	posted 10/3/08 5:14 AM     hey cheese to tel the difference between a boy and girl yabby is to look at their legs if it has 1 hole either side of its third pair of legs its a girl but if it has a hole either side on its last pair of legs its a boy . im 13 so hopefully its not too technical anywayz hope this was a help
Conan	posted 2/2/09 10:16 AM     There seems to bit some confusion of several species here . First off the majority of crayfish sold by Pet stores that are blue are the Procamabrus species . Yes the males have a longer claw and the females a fatter short claw. The male also have a thorn like extention on there last leg by the tail. Last on these is they are not yabbies. True Blue yabbies were origonally from Australia ; although there are a few captive breeders here in the USA . Only the Cherex Quadricarinatis Has the red on the males claws . These are commonly know as the Blue knight lobsters although most are a dark green and brown mix in color. The true blues yabbies are the Cherex Albietus, and the Cherex destructor.These can get to be 12 inchs although commonly they are 6-8 inches with the male commonly larger in size. Please note most people in the USA do not have the Cherex species of crayfish ! These blue Cherex are usually rare here in The USA and expensive to buy . I have Cherex species and have breed them in captivity. I hope this clears up some of the things discussed above.
Crusty	posted 5/6/09 9:59 AM     My goodness this thread splits off in all directions. Recently, I fell from a plane at 14,000feet but anyway that is just trivia./.. The question from what I can see, "WHY HAS MY CRAYFISH TURNED BLUE".... The easy answer is "All crustaceans kept in an aquarium, with a cartenoid poor diet will turn BLUE". What this means is, majority of feeds will lack in some essential vitamins (particularly vitamin A). But hey, keep feeding rabbit food to your crayfish... http://www.crayfishmates.com crayfish forum
nikkin	posted 7/20/09 8:32 PM     I read that a poor diet and mainly lack of vitamin A will turn a crayfish blue.. sooo my question is what if my crayfish eats mainly carrots and peas and his claws are turning dark purple.. he has molted 2 times since we picked him out of the ditch almost 2 months ago.. anyone care to answer this one for me? :)
reno	posted 9/20/09 3:00 AM     how do you chang brown yabbis to blue

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