Mickey mouse or worm like thing?

saitoking

Reefing newb
Ok this is the first time I have seen this worm like animal anyone know what it is? It looks very funny lunging up the glass, head going up and down. It has 2 ear like thing looks like Mickey mouse except for the long body can't see any eyes either. It's about 1/2 inch long. Thanks saitoking
 

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More hitchhikers

More hitchhikers 1st picture I am not sure what it is kind of looks like the opistobranch but moves in a different way more snail like, it glides along. Anyone can help ID this would be a great help. The 2nd picture I think is a Stomatella. 3rd picture is another picture of the opistobranch.
 

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Unwelcome Hitchhiker

This morning I noticed a few of my zoas withdrawn and in the middle of them I see a unwelcome guest I believe to be a aiptasia. I was lucky the zoas are on a piece of branch coral that was easy to cut out. Anyone know for sure thanks for looking. saitoking
 

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It has been awhile now but some how they are multiplying. Tonight I counted 8 opistobranch in my tank just wondering how they reproduce anyone know? Thanks Charles
 
I'm not sure how they reproduce. Some nudis lay eggs, so they reproduce sexually, but that doesn't mean that they don't have the potential to reproduce asexually as well. Or it may even vary by species. Good question...
 
Tonight I was doing my weekly vacuum and water change when pouring out the dirt I spotted something in the sink, very small but it was a brittle star I think. It is very small so small it looked like hair in the sink.
 

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