Can anyone identify what this is?

[Pistol Peet]

Can anyone identify this creature?

 

[Wes10C]

Polyclad worm i think. Set it on fire. They creep me out.

 

[OrionN]

It is a flat worm. This one is a free living, non parasitic flatworm. I just leave him be.

 

[Pistol Peet]

Polyclad worm i think. Set it on fire. They creep me out.

Thank you googled the b are u gave it is exactly that and will be burned..... thank you very mucb got your help

 

[Mr_Knightley]

It's a species of large flatworm, as @OrionN said it's a free living type and should not bother any fish or corals. I personally have one that's over 4" in diameter, it's awesome.

 

[Wes10C]

It may be a harmless creature im not sure, but if it was in my tank id get rid of it.