I found 2 of these in my shrimp tank and sucked them up since I didn't know if they were good or bad. Anyone know what these things are? they have 6 legs and they swim around by wiggly around like a worm. Creepy looking!
Damsel fly nymph / larvae. Native species more than likely. To the best of my knowledge they are not carnivorous like dragonfly larvae, damsel fly nymphs are herbivorous - mostly algae. My guess is you got water / infusium from an out-of-door source, like pond. If that is the case put it in the water source you got it from.