algae and coral troubles

[bri.reffin]

when i had 0 algae, i wanted some sort of algae but now its over run. and my 1 turbo snail barely moves. can anyone identify the alage in the back of my tank.

and is anyone experienced with goniporia theres a hollow hole that sometimes appear mid day the turbo snail did knock it over when it was placed high

 

[T-J]

Since it's in the back corner of the tank, I'm guessing it's an area of little to no flow. You need to adjust your powerheads/wavemakers to get some more flow back there. Kinda looks like dinos, but hard to tell. Does it get worse during the day and clear up after the lights have been off for a bit?

Regarding the goni, looks like you're missing an arm. Hopefully it's not a sign of die-off. Looks like you have it in a good spot, as I recommend keeping them on the bottom, but off the sand. If you post your params, that will help. IME, gonis like dirtier water. I have gonis that have gone from smaller than yours, to the skeleton being the size of a softball.