What could bite a bass like this.

[Backwoods101]

Without a doubt that is a sasquatch bite.

X2 yep

[SaltwaterSlick]

...never mind. I reread the OP and noticed it was in a small pond...

[Ed Oswald]

Chupacabra???

[GrapeApe]

Ya'll are nuts. That's obviously from the new cross-breed of aquatic chupacabra. The government has been breeding them with sharks to get new species. They also have flying ones, invisible ones, and the regular plain ol' cabra variety.

[gonzaleziam]

12 foot Great white?

[SKLOSS]

Chupaturtomorantagator

[duckmanep]

If you have otters, you better get rid of them quick before all your fish end up like this.

[Speedgoat]

A mermaid with a bad grill!!!

[cattlelackranch]

What could bite a bass like this.

First thought was turtle.

But I'm gonna go with boat prop.

I'm going back to turtle and possibility bird or maybe a mermaid.
I'm also considering going back to grade school for reading comprehension. Didn't realize OP said 1 acre pond. Doh!

[rednecktbrizz7]

I'd guess a water turkey over turtle just based on size and speed of bass

[Rich...]

Water turkey

[courtatlawjudge]

I'm another one that learned a water turkey and cormorant aren't the same thing. But I'll bet they have the same nasty habits! Thanks for sharing that.
BTW, I agree red eared turtles have no effect, but I live in softshell country and those big sliders are hard on fish population.

[BrianL]

Otter, and if you want any fish left i your pool, hang out with rifle and shoot them before it is too late. They can wipe out a large pool in a matter of weeks.

[Tommyh]

so, to totally hijack this thread, the diving birds i see in the ponds and lakes and bayous are cormorants? how do you tell the two birds apart?

[hellbndr23]

Dad caught a glimpse of a big snapping turtle today. He was stalking ducks. Trap had been ordered. We shall see.