Disney Attack: Evidence of Alligators Prior to Attack

A video has surfaced showing an alligator in a lagoon ... and the person who shot it tells TMZ it's the same body of water where a 2-year-old boy was attacked.

The clip shows a lagoon that has the same markers as the Seven Seas Lagoon at the Grand Floridian Resort in Orlando. Check out the raised sandbar. You also hear a small child excitedly yell about seeing an alligator.

The person who shot the video tells us it was recorded a few days ago ... shot from the wedding pavilion at the resort.

And we got this photo (above) which shows a gator in the same lagoon back last month.

Search and rescue responders have pulled several gators from the water in the last 12 hours, yet there are no signs posted warning people that alligators are in the water.

We contacted Disney but so far no comment.