We were at a beach here in Davao (Samal Island) and filmed a few snakes in the ocean.

One of them was black with yellow stripes, and once I got home and Googled it, I found that the Sea Snakes, especially that one is extremely poisonous. This is a 3rd world country so it doesn't have the benefit of being civilized enough to post warning signs.

We were all swimming and walking in the ocean.. it would have been very easy to step on one, and based on what I saw.. I think there were a lot of them there.