BLACK SEAHORSE ........................REMEMBER TO PICK UP A COUPLE OF TREE SPONGES SO THE SEA HORSE HAS A PLACE TO REST. THEY LIKE TO CURAL THERE TAIL AROUND THE BRANCHES. AS AN ADED BONUS THE RED OR ORANGE TREE SPONGE (LOOK FOR IT IN CORAL) WILL BRIGHTEN UP THE TANK AND ADD A SPLASH OF COLOR. YOU CAN KEEP SEVERAL SEHORSES TOGETHER. IT IS RECOMENDED YOU KEEP SEAHORSES IN A SPECIES ONLY TANK . SO THEY DO NOT HAVE TO COMPETE FOR FOOD AND THEY ARE NOT HARRSASSED. FEED THEM BRINE SHRIMP AND PHYTOPLANKTON.