is this normal?

i have these blue mushroom that when fully open reach about 3 1/2"-4". i was just wondering if this is the normal size for these blue mushrooms.
 
most mushrooms will reach up like that if they are trying to get better light - i think :lol:

someone correct me if i am wrong.
 
I have big ones next to little ones.. no telling how big they're 'supposed' to be. As long as they're healthy (they look great), why worry?

Those aiptasia, on the other hand :)
 
that's just weird, I got some mushrooms from Gant once, they were huge in his tank and since being in mine, they are about nickel sized. I do notice though, that the shrooms in the shade are bigger---go figure
 
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