What are these on my hammer?

[JediCruz]

So I have these 2 things on my hammer. They’ve been there for a while and I thought they were just some crust of some sort flaking off. Now I see that the underside of them actually has white growth and to me it seems to be some type of mollusk. Does anyone have any clue? Don’t mind the GHA, vermitid and I think an old barnacle. I do want to mention that when I shine a light on it at night, it does close up. The pics below are night shots where the “mouth” is open.

 

[vetteguy53081]

Spirobid worms. Theyre harmless. If you want, you can place hammer in a container of tank water and toothbrush them off

 

[JediCruz]

Spirobid worms. Theyre harmless. If you want, you can place hammer in a container of tank water and toothbrush them off

Actually, not the spirobid worms. I have those everywhere. I’m referring to what they are growing on.

 

[vetteguy53081]

My bad- you circled it- Duh
Its a member of the scallop family and common hitchhiker known as Bi-valve. They filter feed and are Not long lived. Harmless

 

[WheatToast]

My bad- you circled it- Duh
Its a member of the scallop family and common hitchhiker known as Bi-valve. They filter feed and are Not long lived. Harmless

Or possibly an oyster.
Of course, you could try to keep it alive by dosing Phytoplankton, but that would elevate nutrient levels.

 

[JediCruz]

My bad- you circled it- Duh
Its a member of the scallop family and common hitchhiker known as Bi-valve. They filter feed and are Not long lived. Harmless

Pretty cool. Now when you saw they’re not long lived, like how long? I ask this since I got the hammer at the end of April of this year and it was on it then. It survived the mini tank crash as well I just now noticed that there were 2 (could be the back of the other?).

 

[JediCruz]

Or possibly an oyster.
Of course, you could try to keep it alive by dosing Phytoplankton, but that would elevate nutrient levels.

I actually used to dose phyto in the tank a while ago but I stopped. Before I dosed the phyto, I also removed my UV Sterlizer. I added the hammer a few months after I stopped dosing phyto. At night, there are all sorts of items flying around the water column. I wonder if that’s why they’re still alive.

 

[WheatToast]

At night, there are all sorts of items flying around the water column. I wonder if that’s why they’re still alive.

Bivalves cannot feed on larger particles, so I doubt it. I have read that they can survive quite a while without sufficient food, although without taking any action, I don’t see it surviving for much longer.

 

[Goaway]

Pretty cool. Now when you saw they’re not long lived, like how long? I ask this since I got the hammer at the end of April of this year and it was on it then. It survived the mini tank crash as well I just now noticed that there were 2 (could be the back of the other?).

6 months to a year. If it survives longer than that, congratulations! Seriously