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[Reefer_kano]

Looks like a type of hairy mushroom (Rhodactis indosinensis)

Thank you, I ask because when I first started with a salt water tank, a local reefer sold me a rock covered with it.
It has grown quite big and spread around my tank.
It has hosted my clows since the first day I got them lol

 

[Reefing102]

Thank you, I ask because when I first started with a salt water tank, a local reefer sold me a rock covered with it.
It has grown quite big and spread around my tank.
It has hosted my clows since the first day I got them lol

Is it one large mushroom or multiple smaller ones? Generally in my experience, hairy mushrooms max out around 3 inches each or so.

If it’s one large mushroom, it could be an Elephant Ear Mushroom (Rhodactis mussoides)