[{"n": "Sponge", "u": "/e/marine-invertebrates/sponge/", "s": "Ancient filter-feeding animals that lack true tissues and organs."}, {"n": "Tardigrade", "u": "/e/marine-invertebrates/tardigrade/", "s": "Micro-animals that are among the most resilient known, surviving extreme conditions including outer space."}, {"n": "Xiphosura", "u": "/e/marine-invertebrates/xiphosura/", "s": "Living fossil arthropods with a sword-like tail."}, {"n": "Acariformes", "u": "/e/marine-invertebrates/acariformes/", "s": "The most diverse superorder of mites, with ancient origins and global ecological impact."}, {"n": "Anomalocaris", "u": "/e/marine-invertebrates/anomalocaris/", "s": "An early Cambrian apex predator and stem-group arthropod."}, {"n": "Arenicola", "u": "/e/marine-invertebrates/arenicola/", "s": "Genus of lugworms known for burrows and mass breeding."}, {"n": "Ascidiacea", "u": "/e/marine-invertebrates/ascidiacea/", "s": "Sac-like marine filter feeders with a cellulose tunic."}, {"n": "Rudists", "u": "/e/marine-invertebrates/rudists/", "s": "Extinct bivalves that built vast Cretaceous reefs."}, {"n": "Salp", "u": "/e/marine-invertebrates/salp/", "s": "Barrel-shaped planktonic tunicates with efficient jet propulsion."}, {"n": "Sand dollar", "u": "/e/marine-invertebrates/sand-dollar/", "s": "Flat, burrowing sea urchins with a coin-like test."}, {"n": "Sea apple", "u": "/e/marine-invertebrates/sea-apple/", "s": "Colorful sea cucumbers of the genus Pseudocolochirus."}, {"n": "Sea cucumber", "u": "/e/marine-invertebrates/sea-cucumber/", "s": "Benthic detritivores with a leathery skin and catch collagen."}, {"n": "Sea slug", "u": "/e/marine-invertebrates/sea-slug/", "s": "Shell-less marine gastropods with vivid colors and diverse adaptations."}, {"n": "Sea snail", "u": "/e/marine-invertebrates/sea-snail/", "s": "Marine gastropod molluscs with coiled shells, eaten by humans and animals."}, {"n": "Sea spider", "u": "/e/marine-invertebrates/sea-spider/", "s": "Marine arthropods with tiny bodies and enormous legs."}, {"n": "Sea urchin", "u": "/e/marine-invertebrates/sea-urchin/", "s": "Spiny marine echinoderms studied as model organisms since the 19th century."}, {"n": "Shipworm", "u": "/e/marine-invertebrates/shipworm/", "s": "Marine bivalves that bore into and consume submerged wood."}, {"n": "Slipper lobster", "u": "/e/marine-invertebrates/slipper-lobster/", "s": "Family of achelate crustaceans with distinctive flattened antennae."}, {"n": "Spanish dancer", "u": "/e/marine-invertebrates/spanish-dancer/", "s": "A large, colorful sea slug that swims like a dancer."}, {"n": "Spiny lobster", "u": "/e/marine-invertebrates/spiny-lobster/", "s": "Marine crustaceans known for spiny antennae and lack of claws."}, {"n": "Squat lobster", "u": "/e/marine-invertebrates/squat-lobster/", "s": "Dorsoventrally flattened crustaceans with long tails, found worldwide from near the surface to deep-sea vents."}, {"n": "Sunflower sea star", "u": "/e/marine-invertebrates/sunflower-sea-star/", "s": "The sunflower sea star (Pycnopodia helianthoides) is a large predator native to the northeastern Pacific."}, {"n": "Tunicate", "u": "/e/marine-invertebrates/tunicate/", "s": "Marine chordates with a tunic and tadpole-like larvae."}, {"n": "Umbrella octopus", "u": "/e/marine-invertebrates/umbrella-octopus/", "s": "Pelagic octopuses with a webbed umbrella-like appearance."}, {"n": "Vampire squid", "u": "/e/marine-invertebrates/vampire-squid/", "s": "A deep-sea cephalopod with the largest proportional eyes in the animal kingdom, adapted to oxygen-poor waters."}, {"n": "Whelk", "u": "/e/marine-invertebrates/whelk/", "s": "Carnivorous sea snails with tapered shells, eaten and used for dye."}]