ID pls, OUTBREAK of floating larvae

[yby]

Hi guys,
Tanks been running for 2 months+, fluval evo 13,
Noticing an outbreaks of free floating larvae like creatures in the display tank tonight and could not figure what it might come from… (swims like a jellyfish, pls see video attached)
Anyone had these happened before? Potential pests or free food? will eventually gets filter out by filter floss anyway but curious to see if anyone could recognise them

All corals been dipped and quarantined before adding to display tank

Fishes not interested in eating them, but porcelain crab seems to enjoying eating them
Corals all healthy, zero loses or disease
Running a hang on back refugium to grow chaeto and copepods

Parameters:
Sal:1.026
Temp:25
Amm:0
No2:0
No3: 2
kh:8.2
Ph:8.0
Po4:0


current livestock:
Coral:
X3 torch
X3 hammers
X1 Trachy
X8+ zoas
X2 scolys
X2 frogspawns
X3 gonis
X2 favias
X1 fungia
X1 refgium + chaeto
x1 bird nest frag
X2 digi

Fish:
X1 royal gramma
X1 clown
X1 tailspot blenny

Invert:
X1 cleaner shrimp
X1 procelain crab
X1 strombus snail
X2 zombie snails
X2 turbo snails

 

[twentyleagues]

Could be pods or Rotifers of some sort but I don't think so seem to big. Maybe crab larva?

 

[fishface NJ]

hydroid jellyfish. They are harmless and will disappear soon.

 

[MERKEY]

hydroid jellyfish. They are harmless and will disappear soon.

This

 

[Kfactor]

love the setup!