Can someone help me id this?

[luis angel]

A couple weeks ago I got these mushrooms and 4 or 5 days later I saw this next to it and it has been growing, can someone help me identify it, thank you

 

[JGT]

Baby hammer.

 

[luis angel]

wow, thank you, I think time will tell if it is from the hammer that I have in the tank or if it is a different one that came with the mushrooms, although looking at it it looks quite similar, thank you very much