What is that!! A R2R guide to common new tank hitchhikers.

[vetteguy53081]

If I haven't added anything to the tank for over 5 months Is that possible?

may have started as a hitchhiker baby and is out as an adult.

 

[OrionN]

Don’t have a good pic but saw this guy on the glass today. Its body is somewhat feathery. It’s the size of a small amphipod

It looks like one of the nudibranch that POSSIBLY be a Montipora eating one. May came in as eggs and now you are in trouble

 

[lubeck]

It looks like one of the nudibranch that POSSIBLY be a Montipora eating one. May came in as eggs and now you are in trouble

If it is a bad nudi how long will it take before I can actually see i have a problem? Do they eat all acros?

 

[santeeeyyy]

Srry I couldnt get a clear photo of this guy, I saw him and sucked him up using coral feeders and I lost him when I was reviewing the photos, He is on my floor or in the sink but I thought he was a zoa eating pest, he might be a pod

 

[Matt Carden]

I got some rock from KP today. I dipped in 53 ppt fresh mixed water. Got a Pistol that went into DT! But one critter gave me pause

 

[vetteguy53081]

I got some rock from KP today. I dipped in 53 ppt fresh mixed water. Got a Pistol that went into DT! But one critter gave me pause

Looks like a peanut worm which if so would be reef safe and eats uneaten food and detritus

 

[Crabs McJones]

Looks like a peanut worm which if so would be reef safe and eats uneaten food and detritus

Agree

 

[JulesH]

Looks like a Shai-Hulud.

 

[CallMeChris]

This tiny critter showed up on my glass directly after a water change. Must of disturbed it out of its normal spot. Any ideas? Nudi? Deco crab?

 

[vetteguy53081]

This tiny critter showed up on my glass directly after a water change. Must of disturbed it out of its normal spot. Any ideas? Nudi? Deco crab?

Looks like a very young or beat up brittle star

 

[CallMeChris]

Looks like a very young or beat up brittle star

Oh yea, I see that now. Those two legs have that look to them.

 

[JulesH]

Hi, I was wondering if anyone recognised what I have growing on some of the hard corals (plating/encrusting) in my tank. The nodule is black and hard. but does not seem detrimental to the corals at present?

 

[CallMeChris]

Comb Jelly? It moves around, never see it move, but they show up on different places. Often on my macro algae stems as well.

 

[CallMeChris]

Another pic

 

[CallMeChris]

Video of it in a action

Comb Jelly? Waving in current in saltwater tank

 

[Crabs McJones]

Another pic

Looks like Benthic Ctenophores

 

[CallMeChris]

I think it.is some type of Dorid Nudibranch that eats sponges/tunicates. Closest I’ve seen is the Sea Lemon, but everything points to them being in the Pacific and these rocks were harvested in the Gulf of Mexico. Thoughts?

 

[Crabs McJones]

Geitodoris immunda, found in the gulf near Florida. Nudibranch family

 

[CallMeChris]

Geitodoris immunda, found in the gulf near Florida. Nudibranch family

Thank you! Diet sponges and tunicates?

 

[Crabs McJones]

Thank you! Diet sponges and tunicates?

Sponges mostly