Philippines ? Scientists exploring a deep ocean basin in search of species isolated for millions of years found marine life believed to be previously undiscovered, including a tentacled orange worm and an unusual black jellyfish.

Project leader Dr. Larry Madin said Tuesday that U.S. and Philippine scientists collected about 100 different specimens in a search in the Celebes Sea south of the Philippines.

Madin, of the Massachusetts-based Woods Hole Oceanographic Institution, said the sea is at the heart of the “coral triangle” bordered by the Philippines, Malaysia and Indonesia – a region recognized by scientists as having a high degree of biological diversity.