Question
I found this parasite in my tank this week. It was the second time I saw it but the first time I lost him before I could catch it. He wasn't on any fish or plant, he was on a wood piece the first time and the second time (when I catch it) it was on a rock.
I only saw one but with the plants, rocks and wood there might be more.
I wonder what is it (google image wasn't really helpfull) and if there is anything I need to do to protect my other tank habitant (shrimps and neon tetra)?
Answer
Looks like a damselfly larvae to me, which isn't actually a parasite. It is, however, carnivorous...
If your fish were larger, this larvae could have turned into food for them, but not in this case as you have small fish. So, as it is they can be dangerous to your fish and shrimp, so best to make sure you get them out of the tanks as soon you find them.
Not sure how it got to your tank, but best to be careful and quarantine new plants for your tank for some time to ensure that they are free of unwanted guests.
Answered By - Joanne C