Wouldn't most fish eat that as a treat?
I literally just put some new plants in, it must have have hitched a ride
Damsel Fly larvae. THere has been a ton of them found in tanks this summer. I found 5 in mine after adding plants. I just caught them and put them in my outdoor pond. They will eat what they can catch but most fish fry are safe from them. They are afraid of fish because the fish eat them. They eat mostly mosquito larvae and other small things.