does anyone now what this is

http://s1104.photobucket.com/albums/h335/frecklehead/?action=view&current=propertyforsale065.jpg

Alien Egg

Woodfloats?

They were all over in shallow water. Looks like some kind of egg.

Frecklehead

bryozoan colony. they are lophophores!

Gambusia holbrooki on the right!