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Invertebrates

Comb Jellies Nudibranchs Sea Pig Octopus Squid Species Octopuses Sponges Equinoderms Jellyfish Deep-Sea Anemones Portuguese Man O'War Annelids Sargassum Ecosystem Ctenophores Cephalopods Sea Cucumber Shrimp Cnidarians Polychaetes Predatory Behavior Molluscs Amphipods Sea Lilies Quallen Nemertines Deep Sea Worms

Painful-Sting ‘Blue Dragons’ Wash Onto Texas Beaches During Spring Break

Researchers urge beachgoers to photograph sightings only because the inch-long sea slugs can still sting when stranded.

Deep-Sea Worm Is First Animal Known to Make Orpiment, Turning Vent Poisons Into Protection

Greenland Fossils Show Cambrian ‘Squid’ Were Ancestors of Arrow Worms