Help with identity

[drakebuffie]

Got this yesterday from a local guy for free. He said an elephant ear mushroom?

The one pic is right after transfer to my tank the other one is him all opened up. Pretty large when opened up. About 12 inches across.

 

[drakebuffie]

I moved a powerhead to see if I could get him to open even more and just looked at tank and he did this

 

[Uncle99]

Elephant ear.
Don’t do well in med/high flow.
Huge mushroom.