WTH was THAT?!?

[Pisces]

Well...I got up this morning, and was admiring my work from last night (hung one of my MH's last night). When I saw this 'thing' swimming around my tank ! Never seen it before.....have no idea WTH it is. Any ideas
It's about a half inch long, white, swims real fast, and from what I could see some what resembles a white, pudgy tad pole....it was definitely alive and swimming. I tried to take a pic but the camera didn't focus on it right.

Then I saw get sucked into the overflow.

Help!