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Crawfish Tank
While in Maryland last year, I thought it might be interesting to keep crawfish in a fish tank. I filled the bottom with masonry sand, and various rocks from around the area. I left on the charcoal filter that I had when I kept freshwater wish. I fed them sinking fish pellets, and occasionally, earthworms.
I found them to be extremely territorial, and aggressive to other crawfish in the tank. Each crawfish would chose a spot in the tank, most of the time under a ledge of a rock, beneath a rock, etc. In the end, I had more fun keeping these crawfish, than any other freshwater fish that I had previously. It was interesting watching them move the sand with their claws creating better living areas, or to defend against other crawfish when eating. Every now and again, I would attempt to throw in some fish into the mix, but the second one of the fish were still, they were dinner to the crawfish. The only species I was able to keep in the tank, were oscars. The oscars tried their hand at eating the crawfish, but a few snips from the claws ended that.
Here are some close ups of the crawfish in the tank. I allowed algae to grow everywhere other than the front and side glass, to keep it looking natural, but not to block viewing.
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