[VeeSe]

Looks like pygmy chain sword.

 

[Optix]

honestly the only real way to tell them apart is how they grow

DS grows under the substrate with new plants popping out
PCS grows over the substrate where you can see the "vines" connecting mother to daughter

I think its PCS

 

[mr_bob]

then yes its chain sword as there are a ton of plants that grow up and over the substrate

thanks for the clearification guys

 

[leviathan0]

It looks like Vallisneria spiralis 'leopard' to me.