Philippines 2614 ad block, 2615 ac sheet

Philippines 2614 ad block, 2615 ac sheet, MNH, $10.50. Marine Biodiversity, 1999. Sea squirt, Banded sea snake, Manta ray, Painted rock lobster; Branching Coral, Seagrapes, Sea Urchin. Block of 4 can be without margin and different order of stamps in the actual block.