The Right Blue

by B. N. Sullivan Behold, our favorite image of  Earth --  the 'Blue Marble'.  This now-famous photograph was taken on December...

by B. N. Sullivan Isn't this a pretty little critter?  It is   Hypselodoris apolegma , a nudibranch from the family Chromodorididae....

by B. N. Sullivan If you go diving or snorkeling in coastal areas of the Mediterranean region, you are very likely to see this Red Sea Sta...

by B. N. Sullivan This Brown Tube Sponge ( Agelas conifera ) is a fairly common sight on walls and reef canyons in the Caribbean region, ...