Electric Blue Crayfish Behavior- is this normal?

DirtyPaws949

Jack Dempsey
MFK Member
Jul 12, 2015
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Hi folks. I have 10 juvie Florida blue crayfish, and have noticed their favorite place to hang out is at the surface, sometimes partially above water, on the hyacinths. They are fairly new, and have noticed them doing it more gradually.
i am curious whether this is a normal (feeding/ socializing/ happy) behavior, or indicative of some issue (oxygen? Stress?). They typically do this the most at night, but some will do it in the daytime. They don’t seem in distress, and there was two successful molts between last night and tonight (I actually got to watch one!)


I was warned to provide lots of places for them to hide since they can be aggressive towards one another. At least at the surface, mine seem content sharing space and hang out in groups.

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IN CASE ITS INDICATIVE OF AN ISSUE
Here are the tank specifics in advanced :)

6ft x 2ft x 2ft galvanized steel tank, sealed with pond armor epoxy.
Sand substrate 2-3”, sponge filter.
there are calcium blocks in the tank for the snails and crays

water parameters
pH: 7.2-7.4
Ammonia: 0 ppm
Nitrites: 0 ppm
Nitrates: 0 ppm
Temp: 74F (had to turn the heater off during a heatwave, outside tank)

tankmates: bettas, platys, guppies, corydoras, Buenos Aires tetras, bloodfin tetras, Golden clams, mystery snails, Malaysian trumpet snails, ramshorn snails, pond snails, small organisms (can list it necessary).

plants: water hyacinth, water lettuce, salvinia minima, duckweed, azolla caroliana, frogbit, Anacharis, Najas grass, hornwort, 1 small lily

Diet: consists of crab-cuisine, shrimp pellets, tropical flakes and crisps, Algae waters, bloodworms, brine shrimp, blanched veggies, I’m guessing an endless plant/snail/critter/fry buffet.
They are fed a variety 2-3x per day.
I have not noticed any significant loss in adult fish.
 

DirtyPaws949

Jack Dempsey
MFK Member
Jul 12, 2015
53
49
36
30
A1278479-DB34-449F-959D-E72A77F7BB3E.jpeg
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When I first got them they were fighting in the bags, when I initially put them in the tank they did go after a couple fish, but they’ve become pretty peaceful... I’d read nightmare posts where people say they’re blood thirsty and evil 😂
I just watched one grab a snail, hold it for a min, then let it go, and when they do bump into each other they both jump back like, whoa sorry.
If they’re usually as mean as I’ve read, the placid behavior may also be a indication of something “off” in either the tank or the crayfish themselves.
 

Deadeye

Exodon
MFK Member
Aug 31, 2020
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I’m not an expert, but from what I’ve read, they tend to be peaceful with each other while they’re young and adult females tend to get along.
They may be trying to get more oxygen or see what’s out of the water. In the past mine have gone high to try to catch fish, so it could be that.
If they are still acting normal, then they should be fine.
That tank is beautiful by the way.
 
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