Critter ID

[ismira]

 

[taricha]

looks like a polyp (paly maybe) and some feather duster worms

 

[WheatToast]

@ismira do you have images of the first hitchhiker under white light (ex. with a flashlight)?
In the second photo, the top organism is a fan/tube/feather duster worm (more feathery, radioles completely surround the top of the animal) while the bottom organism is a barnacle (less feathery, cirri do not form a complete ring around the top of the animal). Both are harmless filter-feeders.

 

[ismira]

@ismira do you have images of the first hitchhiker under white light (ex. with a flashlight)?
In the second photo, the top organism is a fan/tube/feather duster worm (more feathery, radioles completely surround the top of the animal) while the bottom organism is a barnacle (less feathery, cirri do not form a complete ring around the top of the animal). Both are harmless filter-feeders.

do you mean like this

 

[WheatToast]

do you mean like this

Almost looks like a young coral polyp as @taricha mentioned, possibly a young mushroom coral (Discosoma I think), though I’m not great with my corals.

 

[ismira]

Awesome thank you, just bought some live rock for my first reef tank and all the little critters are coming out but no idea what anything is

 

[WheatToast]

do you mean like this

Is that green ring surrounding the hitchhiker a part of the organism?

 

[ismira]

Is that green ring surrounding the hitchhiker a part of the organism?

I believe so, the brownish red circular part in the centre closes up sometimes