2007-02-16 02:35:08 · 11 answers · asked by Anonymous in Pets ➔ Fish
Depending on the type of crayfish, this is natural. There are store-bought ones from Florida ("electric blues"), but I have ones in a lake near my house that will do this, they just don't get as intense in color - I "discovered" them by accident. I was looking for native fish for a display tank and took a few young BROWN crayfish (about an inch long) and set them up in a separate tank. Where I had them the pH of the tapwater was really high (around 8.3) and they started changing color within a month. Turns out, the pH has a lot to do with the color change - there was an article in a fish magazine about them a few years back that talked about their care. In addition to the high pH, they need calcium in their water to keep their carapace (shell) hard, so the high pH water that I had (complete with high calcium sulfate) was the best thing I could have put them in! The article also said that if you use "blue" decor, it would also bring out more blue coloration. They like places to hide, so I bought them each a blue plastic cup for a "cave", but it didn't seem to change the coloration, though.
As MM said, food can be used to bring out some of the color. Since they're basically a crustacean too, I would give mine shrimp pellets along with other sinking foods.
Info on Florida "blues"
http://www.centralpets.com/animals/fish/freshwater_inverts/fwi5009.html
Info on care: http://www.anapsid.org/crayfish.html
2007-02-16 03:32:10 · answer #1 · answered by copperhead 7 · 1⤊ 0⤋
Blue Crawfish
2016-11-04 02:42:30 · answer #2 · answered by wyckoff 4 · 0⤊ 0⤋
It could be genetic. I read an article about blue lobsters, which was a rare symptom of a gene difference for color of the exoskeleton. Other than color, it wasn't anything to worry about. In the wild, they can't hide as well from predators, so are more rare. Crawfish and lobsters aren't too different, other than size, so that may be what it is in your case.
2007-02-16 02:41:34 · answer #3 · answered by fishing66833 6 · 0⤊ 0⤋
Blue Crawdad
2016-12-17 13:25:23 · answer #4 · answered by Anonymous · 0⤊ 0⤋
The blue coloration usually comes from naturally occurring chemicals in the food you feed. Feeding brine shrimp pellets is one of the "famous" ways to turn a crawfish blue but quite a few other foods also contain the right chemicals to do it. No harm will come of it, but if you like him better his more natural color you can change his food.
MM
2007-02-16 02:42:10 · answer #5 · answered by magicman116 7 · 0⤊ 2⤋
Petsmart will test your water for free, and give you advice on what you need to do. Every week or so I put about a half cup of water from my tank into a zip baggie and go have it tested. Try this before you take any other advice on here as you might put something wrong or harmful into your water.
2016-03-18 02:26:11 · answer #6 · answered by ? 4 · 0⤊ 0⤋
Mine turned blue after it ate goldfish color enhancing flake food.
2014-10-04 12:00:47 · answer #7 · answered by ? 2 · 0⤊ 0⤋
that is normal. a lot of people actually sell them as electric blue ''lobsters'' once they turn blue. its just a thing to do with their genes and what not. dont worry tho everything is ok
2007-02-16 02:39:53 · answer #8 · answered by Anonymous · 2⤊ 1⤋
Well it seems as though you have what they call a
2007-02-16 02:41:22 · answer #9 · answered by danielle Z 7 · 0⤊ 0⤋
He's cold
2007-02-16 02:37:59 · answer #10 · answered by jonah 5 · 1⤊ 1⤋