Got a hitchhiker or unknown critter?? Check here for an ID

[WindeyD]

Pineapple sponge for sure, harmless filter feeders.

 

[gacolt]

acro eating spider.bad they eat acro's:cry:

 

[Dangerous10k]

Thanks I was thinking i had some kinda strange aiptasia or something is there a way to get them to leave the display and stay in the sump or no?

 

[mcdonaldjr84]

Have a new friend in tank not sure what it is, tank has been up for two months,live rock,sand and coral( mushrooms ,zoos,kenya tree) no fish yet, but this thing showed up swimming

 

[NanaReefer]

What are these ?(dead center pineapple shaped) whatever they are their reproducing

Pineapple Sponge. Harmless filter feeders, will eventually go away.

 

[NanaReefer]

Have a new friend in tank not sure what it is, tank has been up for two months,live rock,sand and coral( mushrooms ,zoos,kenya tree) no fish yet, but this thing showed up swimming

Omg! How freaking cool is that!! Definitely looks like a fish. Maybe Paul B might know!

 

[gacolt]

Have a new friend in tank not sure what it is, tank has been up for two months,live rock,sand and coral( mushrooms ,zoos,kenya tree) no fish yet, but this thing showed up swimming

Dinosaur

 

[rmiles54]

Anyone have any go around with these. I'm guessing some sort of nudi?

 

[rmiles54]

Sorry guys was having an issue attaching pic. Anyone have an idea? Should I be looking to remove? For size reference it's climbing up a dime size snail shell.

 

[evolved]

It's a nudibranch of some sort.

 

[rhyan]

Got one of these on a piece of live rock today. I was wondering if it was a sand sifter... Anyone know? It may be too small to tell, it's about a centimeter long. Thanks for the help!

 

[Tahoe61]

^ Odds are it's an Asterina.

 

[Eckolancer]

Have a new friend in tank not sure what it is, tank has been up for two months,live rock,sand and coral( mushrooms ,zoos,kenya tree) no fish yet, but this thing showed up swimming

Maybe a pipefish

 

[GrizFyrFyter]

Have a new friend in tank not sure what it is, tank has been up for two months,live rock,sand and coral( mushrooms ,zoos,kenya tree) no fish yet, but this thing showed up swimming

Anyone know what a baby Oarfish looks like? This is what I imagine it looks like.

 

[djtripoalo]

Have a new friend in tank not sure what it is, tank has been up for two months,live rock,sand and coral( mushrooms ,zoos,kenya tree) no fish yet, but this thing showed up swimming

Could def be a type of garden eel[emoji106] great hitch hiker

 

[Tahoe61]

Pearl Fish, lives in the intestional track of sea cucumbers.

 

[rhyan]

Got a better pic of the top of my starfish hitchhiker. Also found another little guy poking out of a hole in the same piece! I think it's some type of red brittle star!

Sorry for the bad quality

 

[rhyan]

Here's a few more pics...

 

[GrizFyrFyter]

Pearl Fish, lives in the intestional track of sea cucumbers.

Nailed it.

 

[NanaReefer]

Here's a few more pics...

Brittle Star.