How do you take care of crawfish and helgramites or whatever. Also this cute creature that lives underwater.?

Question

The creatur have 6 legs and has jaws that look amazingly weird. Its cool. Also how do you take care of a logperch and a great diving beetle?

Answer 1

a logperch how do you know abou a logperch? Well if I were you I would ask on the only native fish and insect website
forum.nanfa.org
but for the logperch feed frozen bloodworms and other livefoods they for the most part will never eat flake food but how big is yours they get 7 inches in length
email me at [e-mail] if you have more questions

the bugs will eat most things from baby feeders to molded fish food

Answer 2

Apart from the crayfish and possibly the logperch, the others won't be easy to keep (don't know for sure what the thing with jaws is, so I can't say on that one - can you give more description?). Helgramites need cool water, and would almost need to have a chiller on the tank. I've tried keeping the aquatic insects, and they need high dissolved oxygen in the tank (most that I've tried attached directly to airstones and stayed there!) and the carnivorous ones need a supply of live foods (you can try to offer frozen bloodworms, I've had some success with getting them to eat these) and keep a supply of fresh algae for the herbivores.

I used to teach and do environmental programs for students and scouting groups, but never had much succes with keeping aquatic insects (other than damselfly and dragonfly larvae) alive for more than a few days. The people who keep these for research use either chillers, or have a flow-through system where water is continuously piped in and out from a natural source (mostly cold-water streams).

The log perch may be able to live in a room temperature tank if it's collected during the warmer monnths of the year and acclimated to the tank slowly. I like frozen bloodworms to start (most wild fish recognize these as a natural food from their environment), and adding other types (gammarus shrimp, daphnia, blackworms, brine shrimp) for variety. What an individual will eat will depend on their size and what looks "natural" to them. I've also found that minnows will eat just about anything, so if you keep a minnow that's already eating these foods with "new" fish, the new ones learn that some of the "unfamiliar" items are also food by seeing the other fish eat them.

Crayfish are relatively easy - just provide them with a filter for aeration and feed any type of foods, even fish flakes or pellets - they aren't picky. They will need to have a "cave" for hiding when the molt their exoskeleton, and a source of calcium for forming a new one (a liquid calcium supplement can be used, or add a cuttlebone (available in pet store for fish - just break into pieces and put one in at a time and remove when they start to look nasty).