Jellyfish..no clue how they got there

[jkef2010]

My wife just noticed I have multiple baby jelly fish in my tank. I don't know how they got in there. I'm 100% positive there jellyfish. Does anyone know how this is possible to get them without introducing them or having a mother jelly. Please help. I don't know if they will live or not right now I have all circulation turned off in order to spot them. Again please help.

 

[EuroGti]

They are prob hydroid jellyfish. Pretty common in aquariums, especially new ones. They are not nuisance and will not bother anything. When the tank stabilizes they will die down.

 

[tyler1503]

I had small jellies hitchhike into my 5 gal. Never harmed anything :
They looked a bit like those party drink umbrellas but translucent and white.