1387-738 - A beautiful bubble shell nudibranch (Hydatina physis), Anilao, Philippines.

1387-734 - Ceratosoma nudibranch, Anilao, Philippines.

1387-709 - Black-lined sapsucking slug, Romblon, Philippines.

1387-649 - Cyerce elegans is one of the beautiful butterfly nudibranchs found in the Philippines, Anilao, Philippines.

1387-565 - A beautiful nudibranch, Chromodoris coi, crawls across the seafloor in Komodo National Park, Indonesia.

1387-491 - A colorful nudibranch, Hypselodoris tryoni, crawls across a sandy sea floor in Komodo National Park, Indonesia. This tropical area in the Lesser Sunda Islands is known for both its amazing marine biodiversity as well its infamous dragons.

1387-490 - A colorful nudibranch, Hypselodoris tryoni, crawls across a sandy sea floor in Komodo National Park, Indonesia. This tropical area in the Lesser Sunda Islands is known for both its amazing marine biodiversity as well its infamous dragons.

1387-262 - A colorful nudibranch (Nembrotha kubaryana) crawls slowly across a reef near the island of Sulawesi, Indonesia. This beautiful, tropical region is home to an incredible variety of marine life.

1387-242 - A beautiful nudibranch (Hypselodoris bullockii) crawls slowly across a reef in Indonesia. This tropical region, within the Coral Triangle, is home to an incredible variety of marine life.

1387-189 - A beautiful nudibranch (Halgerda batangas) crawls on the sandy seafloor of Lembeh Strait, Indonesia. Lembeh Strait is known for its diverse array of bizarre marine organisms.

1387-155 - Nudibranch on coral, Papua New Guinea, Pacific

1387-113 - A cymbal bubble snail (Haminoea cymbalum), Fiji, South Pacific, Pacific

1387-89 - A pajama nudibranch (Chromodoris quadricolor) attempts to climb up the side of a sea cucumber, Philippines, Southeast Asia, Asia

1116-46832 - Gymnosome pteropod (Hydromyles globulosa), a shell-less, planktonic mollusk sometimes called the sea butterfly, Bali, Indonesia