You can also check it on my Instagram account: http://instagram.com/p/yAJhpiwZHA/?modal=true
Yup, a shark made out of sand, standing right there on the beach. I thought this was awesome as I ,prior to that, seen a video on Youtube with this easter egg. Pretty neat, huh?
This happened the other week on the beach in Los Santos. Explore it for yourself and may you find it.