neocaridina shrimp attacked fish - The Planted Tank Forum
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post #1 of 4 (permalink) Old 04-23-2020, 06:56 AM Thread Starter
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neocaridina shrimp attacked fish

I have a 29gallon planted tank with drift wood and rocks. I’ve had 3 white gold minnows, a small bristlenose pleco and what was 6 neocaridina shrimp, and everything was good the three different species had no interest in each other. Well today I introduced 13 new neocaridina shrimp into the tank and things have been swell (minus 2 of the original 6 having a parasite today.). Anyways it’s night so lights are oof and I shined my phone light to get a look if any of the new ones where more active and saw a new shrimp about half the size of my fish swim after the minnow and jump onto it and then off before trying to follow the fish again. I’ve heard of aminos in groups hunting fish but can’t find anything about neocaridina doing that. I’m stumped as my old big cherry has no care for them but this new little one is aggressive. And I don’t think it’s a lack of food problem I honestly think I’m over feeding them and the old 6 where very content. Should the one be removed if I can figure out what one it was? Can a single neo hurt or stress out a minnow? Do you think they will gang up?
This is my 2nd shrimp thing in 24hrs. Didn’t think these cuties should be this much trouble.
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post #2 of 4 (permalink) Old 04-23-2020, 08:05 AM
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If the fish somehow "smell" good to the shrimp, then yes, they will. Maybe there's something wrong with the fish?
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post #3 of 4 (permalink) Old 04-23-2020, 08:13 AM Thread Starter
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The fish seems to be acting as normal I’ll have to keep a closer eye to make sure it’s healthy. And that the shrimp stay off.
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post #4 of 4 (permalink) Old 04-23-2020, 03:14 PM
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They're scavenging detritivores and not known to be hunters, nor do they have the anatomy for hunting. I'd think if one was "chasing" it would either be coincidence, confusion, or *something* on the fish sending scents or other signals of food. I raise tiny egg scattering fish in Neo tanks and have never noticed them even show interest in fish fry 1% their size. I've not even observed them eating eggs. I would just keep an eye on the tank and see if the behavior repeats. I'll be shocked if you have a killer Neo on your hands.
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