What are these creature in my tank?

[professorjimjam]

I see these creature , not sure what is it. I find them in the button of cuttlefish bone and also some decors. Are these dangerous to my fishes? Do I need to get rid of them and if yes how?

Appreciate your help as always.

 

[deeda]

I'm fairly sure they are leeches but not positive. Do you also seem them attached to the aquarium glass and if so, can you describe how they move?

 

[tlindsey]

I believe I see eyes and arrow shaped head if so those are planaria. I agree with D deeda observe how they move. If they glide across the glass or substrate then definitely planaria. Leeches move like a earthworm.

 

[professorjimjam]

Thanks guys. They are not in the glass only beneath decor and always hiding.

This is how they move see please video here

 

[tlindsey]

Thanks guys. They are not in the glass only beneath decor and always hiding.

This is how they move see please video here

Ok movement like earthworms leeches.

 

[deeda]

P professorjimjam was that video taken underwater or out in the air? Underwater video may be more helpful and you can always use some tank water in a container rather than dipping that cuttlebone back in the tank.

 

[Deadeye]

They remind me of the planarians I had in my scud culture. Underwater videos/pictures would help though.
I’ve never heard of them being harmful to fish, just unsightly in large numbers. They make great feeders for small fish.

 

[professorjimjam]

Silver Tier VIP
The video was taken outside the water. I will record a post under water movements.

Thanks very much guys