56. Gurney's sea pen - Ptilosarcus gurneyi - Sea pens are colonial coelenterates that stick up from the mud like a feather, feeding by filtering water through the branches. When threatened, they pull themselves down into the mud. When disturbed they may also display startling flashes of brilliant orange bioluminescence.

Continue Your Tour Here

---

The International Year of the Ocean Home Page is a publication of
the NOAA Home Page Design and Construction Company