What are these eggs? 1st time coral.

[rickysfarmandhatchery]

I got a Hitchhiker on a Hitchhiker...?? What are the names of these corals? What are those eggs?

 

[WalkerLovesTheOcean]

Those are zoas. The eggs could be alot of things. Do you have snails? What type? Nudibranchs? What type?

 

[rickysfarmandhatchery]

I got it at the pet store... Who knows

 

[ISpeakForTheSeas]

I got a Hitchhiker on a Hitchhiker...?? What are the names of these corals? What are those eggs?

Eggs growing on a coral like that are pretty much always a red flag, especially in a spiral-shape - in this case, I would guess those are probably Paly/Zoanthid Eating Nudibranch eggs (I'm honestly nor sure what kind of zoantharian you have there, but it's either a Palythoa or a Zoanthid), but I can't say for sure:

my best guess would be Aeolidiopsis/Baeolidia harrietae (there's some dispute around what genus the critter should fall into).

Either way, if my guess is correct, it's a known zoanthid eater, and it takes the zooxanthellae from its prey and stores it for use in its own body.

My guess would be Baeolidia palythoae or Baeolidia harrietae - they eat zoantharians like palys.

Also, the last pic you shared is of a medusa-stage hydroid - they generally die off after a while, but they stick around if they have enough food (copepods and such) to eat or are a photosynthetic species.