Need Help Identifying

prthd

Reefing newb
Hi, im new to the hobby, my tank has been set up for almost 3 weeks. i have some things on my live rock id like to know what they are. one is purple and the pitcure i think i decent. the other is in the crack of the rock, and it seems like it might be 2 or 4 sections. its pinkish, and grey and might have some yellow on it. i just noticed it last night when i was redoing my rocks. any help weould be greatful.

Phins to the left

Dave
 

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here are some other pictures of my tank. i got a 75 gallon.
 

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That first pic looks like coralline starting to grow to me.The 2nd is some kind of crab hiding in the rock.

You've got a good start there.:D
 
so i did some research, on purple coralline aglea and came across this picture. could this be what i have starting. how old would you say this is.
 

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