Looking for some help identifying the following pictures

[tdowning]

Hey all! I am about a month into the hobby and loving it so far! I have a Biocube 29 with about 20 pounds of LR and 20 pounds of dead (now coming to life) rock in it! I have a few things in my tank that I don't know what they are and was looking for your help in identifying them. I've circled everything in Red that I need your help with! Also, if you see anything that doesn't look right please let me know that as well. I appreciate all your help and I'm so excited to be part of the reef community!

First picture, the little white plants that go in/out of the rock as the day progresses

Second picture, red things that look like hearts and plant that looks like some type of coral attached to the rock

Third picture, hoping to identify what type of urchins they are (hitchhikers from LFS LR)

Fourth picture, another angle of the second picture

Fifth picture, A rock that opens and closes throughout the day...is that normal?

Thanks again for your help!

 

[Tahoe61]

Image#1 left, Aiptasia, right feeding Sea Cucumber.
Image#2 upper, looks like a sponge type, could be a Foraminiferans though, lower Aiptasia.
Image#3 Purple Spine urchins.
Image#4 is the same as image#3.
Image#5 is a Bi-valve, clam or oyster, a filter feeding and harmless.

 

[tdowning]

Image#1 left, Aiptasia, right feeding Sea Cucumber.
Image#2 upper, looks like a sponge type, could be a Foraminiferans though, lower Aiptasia.
Image#3 Purple Spine urchins.
Image#4 is the same as image#3.
Image#5 is a Bi-valve, clam or oyster, a filter feeding and harmless.

Wow, thanks!

 

[tdowning]

Image#1 left, Aiptasia, right feeding Sea Cucumber.
Image#2 upper, looks like a sponge type, could be a Foraminiferans though, lower Aiptasia.
Image#3 Purple Spine urchins.
Image#4 is the same as image#3.
Image#5 is a Bi-valve, clam or oyster, a filter feeding and harmless.

Quick google says that Aptasia's aren't very desirable. Are those something that I should consider removing?

 

[Tahoe61]

Yup aiptasia most definitely undesirable. Since this tank is fairly new if I were you based on the fact that you have quite a few I would go with the Peppermint Shrimp option.

The link provided below is for ID's(have fun), amazing critters show up in tanks.

http://www.lionfishlair.com/hitchhikers-guide/

 

[saltyfilmfolks]

Wow, Absolutely amazing rock there!

 

[mushroomrob]

Very nice tank! Not sure what they are though.

 

[lewis.maryann08]

I love the purple uchin i would take one off your hands lol

 

[NJHC]

Kill the aptasia, keep the red sponge

 

[bump3rb33tl3]

The red object in picture #2 looks like a sea squirt to me.

 

[Tahoe61]

The red object in picture #2 looks like a sea squirt to me.

Could definitely be a possibility.

 

[bump3rb33tl3]

Could definitely be a possibility.

I think so, I have a few on some LR I picked up that are farmed from Marshal Island. Great additions and a neat find!

 

[bump3rb33tl3]

Here is my sea squirt. Was a stow-away on some LR i picked up. He is a little unhappy, but a sea squirt none the less. Is this what yours looks like?

 

[Lionfish Lair]

It's definitely a tunicate, as said.