What are these?
- Thread starter Camd4k
- Start date
- Tagged users None
look like Hydroids to me, and most of the time if the tank is newer (say 1-3 months old) you can see this little rockets like pulsing around. also they can be the juvenile/larvas of some sort of life in. But I'll bet on hydroids jellyfish
OP
OP
Camd4k
New Member
Are they harmful?
yep, they'll disappear over the time usually. you can read here about them
jfoahs04
Well-Known Member
Not particularly. They can allegedly sting a little and some say your fish can feel them, but they aren’t going to kill or severely injure your fish or coral either. They’ll generally go away in their own over time. I still see one or two every now and then in my 3 mo. old tank.
