Tiny Jellyfish In My Tank

[MossyFroggyLove]

Found this little jellyfish like creature in my tank swimming around at night and clinging onto the glass, sand and rocks.

 

[Lavey29]

Hydroid jellyfish

 

[MossyFroggyLove]

Hi, is hidroid jellyfish dangerous or is it a pest. I have a few adult hidroids growing on my gsp coral in the gaps of each polyp.

 

[Lavey29]

Hi, is hidroid jellyfish dangerous or is it a pest. I have a few adult hidroids growing on my gsp coral in the gaps of each polyp.

Common in new tanks, they will self regulate and vanish in short period.