Sign up for free

Newsletters

Once a month
get new photos
and expert tips.

Photography
Main Photo Galleries Wallpapers Photo of the Day Photographers Photo Tips Buy Prints

White-Spotted Sea Squirts

This close-up of a colony of white-spotted ascidians (Pycnoclavella diminuta) in Indonesian waters resembles aliens ready to feed. Instead, these ascidians, or sea squirts, are filter-feeding animals with one siphon to pull in water and another to discharge it. Adults remain rooted to the same spot their entire lives.

Photograph by Tim Laman