Name a sea animal that isn't a fish or a bird

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• Creeping comb jelly85
• Creeping orange hydroid85
• Cremona's slug85
• Crenate barnacle85
• Crenate vitularia85
• Crenellate disc-fin squid85
• Crenulate Astarte85
• Crenulate auger85
• Crenulate mitre85
• Crenulate nutclam85
• Crenulate paperbubble85
• Crenulate tellin85
• Crescent octopus85
• Crescent sea cucumber85
• Crested limops85
• Crested nembrotha85
• Crested oyster85
• Crested reef crab85
• Crested turris85
• Crevice crab85
• Crevice sculling crab85
• Crevice spider crab85
• Cribrimorph bryozoan85
• Crimped cirolanid85
• Crimson coral shrimp85
• Crimson jelly85
• Crimson pasiphaeid85
• Crinoid85
• Crinoid snapping shrimp85
• Crinoid worm85
• Crisp pillow coral85
• Crispate scissurelle85
• Crispate venus85
• Crispy crust coral85
• Cristate pea crab85
• Crocea clam85
• Crocker's sea snake85
• Crooked heart sea urchin85
• Crooked pillar glass sponge85
• Cross jellyfish85
• Cross tellin85
• Cross-barred venus85
• Cross-fish85
• Cross-hatched lucine85
• Cross-sculpture Crenella85
• Crossbanded grass shrimp85
• Crown conch85
• Crown cone85
• Crown Doto85
• Crown jellyfish85
• Crown sea star85
• Crown trophon85
• Crowned baler85
• Crowned cone85
• Crowned coral crab85
• Crowned cup coral85
• Crowned Dendrodoris85
• Crowned firefly squid85
• Crowned hairysnail85
• Crowned mitre85
• Crowned nudibranch85
• Crowned rock shell85
• Crowned sea anemone85
• Crowned sea urchin85
• Crucifix crab85
• Crude whelk85
• Crumb-of-bread sponge85
• Crumpled duster sponge85
• Crumpled sponge85
• Crust coral85
• Crustal fire coral85
• Crusty bryozoan85
• Crusty nautilus85
• Crusty red anemone85
• Cryptic burrowing anemone85
• Cryptic Coral85
• Cryptic kelp crab85
• Cryptic phyllodesmium85
• Cryptic sea cradle85
• Cryptic teardrop crab85
• Cryptic white sponge85
• Crystal jelly85
• Crystal Miniature Cerith85
• Crystal shrimp85
• Crystal tellin85
• Ctenella coral85
• Cuba corbula85
• Cuba dwarf pedipes85
• Cuba frogsnail85
• Cuba lucine85
• Cuba transennella85
• Cuban Reef Sponge85
• Cuban vitrinella85
• Cucullate rock oyster85
• Cucumber sea anemone85
• Cucumber volute85
• Cultellus clam85
• Cuming's cone85
• Cuming's murex85
• Cuming's worm shell85
• Cuneate Donax85
• Cuneate montacutid85
• Cuneate tellin85
• Cunjevoi85
• Cup coral85
• Cupola vitrinella85
• Cupped shipworm85
• Curly carrier shell85
• Curly murex85
• Curryfish85
• Curtained jelly85
• Curve-ribbed miter85
• Curved datemussel85
• Curved needle-pteropod85
• Curvespine cuttlefish85
• Cushion star85
• Cusp shell85
• Cuspidate Clio85
• Cut Cyclocardia85
• Cut-off cleftclam85
• Cut-ribbed ark85
• Cuvier's beaked whale85
• Cuvier's cone85
• Cyclope nassa85
• Cylinder date mussel85
• Cylindrical atys85
• Cylindrical cone85
• Cylindrical finger coral85
• Cylindrical snapping shrimp85
• Cylindrical spindle-bubble85
• Cymbal bubble shell85
• Cyphastrea85
• Daddy-longlegs crab85
• Daedalus' nudibranch85
• Dagger Emarginula85
• Daggerblade Grass Shrimp85
• Dahlia anemone85
• Daisy anemone85
• Daisy brittle star85
• Daisy snapping shrimp85
• Dall blade shrimp85
• Dall tuskshell85
• Dall's chromodorid85
• Dall's Dendronotus85
• Dall's porpoise85
• Dall's unicum top85
• Dalmatian mane jelly85
• Dalmatian sea slug85
• Damon's volute85
• Damselfish parasitic isopod85
• Dana octopus85
• Dana octopus squid85
• Dana swimcrab85
• Dana's blade shrimp85
• Dana's chiroteuthid squid85
• Dana's hermit crab85
• Dana’s whiplash squid85
• Dance volva85
• Dancing Fiddler Crab85
• Dandelion coral85
• Danielle's thorunna85
• Danielssen's zoanthid85
• Daphne's chromodoris85
• Dark blue soldier crab85
• Dark cerith85
• Dark diana conch85
• Dark doto85
• Dark drupe85
• Dark dwarf-turban85
• Dark mantis shrimp85
• Dark pitar venus85
• Dark shore crab85
• Dark stinging sponge85
• Dark unicorn85
• Dark Volcano Sponge85
• Dark-finger coral crab85
• Dark-red sea-pen85
• Dark-spot Cadlina85
• Darkglove hermit85
• Darkmargin batwing slug85
• Dart squid85
• Dartnose pear crab85
• Date mussel85
• Daum's reef lobster85
• Davis's zoanthid85
• Dawson's Kellyclam85
• Day octopus85
• De Man's snapping shrimp85
• De serre’s pelican’s foot85
• Dead man's fingers85
• Dealer's cone85
• Debelius reef lobster85
• Decollate planaxis85
• Decorated Chromodoris85
• Decorated lucine85
• Decorated marginella85
• Decorated mitre85
• Decorated reticulidia85
• Decorator crab85
• Decussate ark85
• Decussate bittersweet85
• Decussate bonnet85
• Decussate risso85
• Decussate turrid85
• Decussate wormsnail85
• Deep blade shrimp85
• Deep jewelbox85
• Deep lobe coral85
• Deep sea squat lobster85
• Deep softshell85
• Deep trouble chalice-bubble85
• Deep water hermit crab85
• Deep water swimming crab85
• Deep water venus85
• Deep-cleft shipworm85
• Deep-sea cherry blossom starfish85
• Deep-sea cookie star85
• Deep-sea mud shrimp85
• Deep-sea red crab85
• Deep-sea star coral85
• Deep-water coral clam85
• Deep-water horny sponge85
• Deep-water mud lobster85
• Deep-water mud shrimp85
• Deep-water rose shrimp85
• Deep-water sea fan85
• Deep-water squat lobster85
• Deep-webbed jewel squid85
• Deeplet sea anemone85
• Deepsea blind lobster85
• Deepsea brittle star85
• Deepsea eualid85
• Deepsea kina85
• Deepsea oyster85
• Deepsea solitary salp85
• Deepsea spinyhead85
• Deepsea sun star85
• Deepsea swimming crab85
• Deepstaria85
• Deepwater bigeye shrimp85
• Deepwater branching coral85
• Deepwater dovesnail85
• Deepwater humpback shrimp85
• Deepwater redfish (sea cucumber)85
• Deepwater stony coral85
• Deepwater tuatua85
• Deer cowry85
• Deer-antler crust85
• Deer-horn murex85
• Deichmann's Fiddler Crab85
• Deichmann's Horny Sponge85
• Del Valle's tiny shell85
• Delessert's cone85
• Delessert's false donax85
• Delessert's lyria85
• Delicate ark85
• Delicate barnacle85
• Delicate cellaria85
• Delicate coral crab85
• Delicate eggcockle85
• Delicate Feather Star85
• Delicate gamba prawn85
• Delicate giant-turris85
• Delicate glass-scallop85
• Delicate heart sea urchin85
• Delicate horny sponge85
• Delicate hydroid85
• Delicate ivory bush coral85
• Delicate moonsnail85
• Delicate needle conch85
• Delicate scallop85
• Delicate sea anemone85
• Delicate sea pen85
• Delicate sea whip85
• Delicate six-rayed star85
• Delicate spiny sea rod85
• Delicate spoonclam85
• Delicate staghorn bryozoan85
• Delicate star85
• Delicate stilt crab85
• Delicate swimming crab85
• Delicate tellin85
• Delightful lacuna85
• Delta macoma85
• Delta prawn85
• Deltoid rocksnail85
• Demon shrimp85
• Demon-faced crabs85
• Demon-faced porter crab85
• Dendritic placida85
• Dendrodoris85
• Dendronephtya crab85
• Dendronotus85
• Denison's dorid85
• Dennison morum85
• Dense bushy hydroid85
• Dense carnation coral85
• Dentate broadface crab85
• Dentate flower coral85
• Dentate limpet85
• Dentate lucine85
• Denticulate goodallia85
• Denticulate rock oyster85
• Denticulate rubble crab85
• Depressed basilissa85
• Depressed cowrie85
• Depressed limpet85
• Depressed rubble crab85
• Depressed scale worm85
• Depressed spider crab85
• Depressed sunset clam85
• Depressed topsnail85
• Deraniyagala's beaked whale85
• Derby hat bryozoan85
• Dermatobranchus85
• Derwent River sea star85
• Desetang's mitre85
• Desirable nudibranch85
• Devaney's boxer shrimp85
• Devil crab85
• Devil's sea whip85
• Devonshire cup coral85
• Diadem cup coral85
• Diadem pearl ovulid85
• Diadem volute85
• Diamond squid85
• Diamondback tritonia85
• Diana conch85
• Diana's Chromodoris85
• Diaphanous hydroid85
• Diaphanous pelagic octopod85
• DiCaprio's squat anemone shrimp85
• Different yoldia85
• Diffuse ivory bush coral85
• Digger hermit85
• Digitate acropora85
• Digitate Pacific drupe85
• Digitate thorny oyster85
• Diguet's pygmy octopus85
• Dilate piddock85
• Diluvial ark85
• Diluvian puncturella85
• Dim rocksnail85
• Dimidiate auger85
• Diminutive cockle85
• Diminutive purpura85
• Dimorphic soft coral85
• Dinner plate medusa85
• Dinosaur nudibranch85
• Diomede's sapsucker85
• Diphos sanguin85
• Dire whelk85
• Dirona85
• Dirt hiatella85
• Dirty cowry85
• Dirty harry85
• Dirty mysella85
• Dirty sea-squirt85
• Dirty spiny sea cradle85
• Disc anemone shrimp85
• Disc-top tunicate85
• Discodoris85
• Discoid stony coral85
• Discordant mussel85
• Discors trough shell85
• Discrepant venus85
• Discus coral85
• Disguised sea cucumber85
• Dish surfclam85
• Dishevelled sea-mouse85
• Disk Dosinia85
• Dispar ascidian85
• Display Doto85
• Distaff spindle85
• Distant scallop85
• Distantly-lineated cone85
• Distinguished Fiddler Crab85
• Distorsio85
• Distorted eulima85
• Distorted Mushroom Coral85
• Distorted mussel85
• Distorted thracia85
• Diurnal horny sponge85
• Divaricate gibbula85
• Divaricate nutclam85
• Divaricate short razor85
• Divergent black coral85
• Divergent lucine85
• Divided Flatworm85
• Divine ceratosoma85
• Divine sea cucumber85
• Djeddah snapping shrimp85
• Djibouti cleaner shrimp85
• Djibouti snapping shrimp85
• Do-not-touch-me sponge85
• Doc's aeolid85
• Dock shrimp85
• Doello Jurado's sponge85
• Dog conch85
• Dog shrimp85
• Dog whelk85
• Dog-faced water snake85
• Dog-rose cowrie85
• Dog's foot cockle85
• Doghead triton85
• Dohrn's abalone85
• Doliolid85
• Doll eualid85
• Dollfu's Hypselodoris85
• Dolphintooth nutclam85
• Dome coral85
• Domed elbow crab85
• Domino shrimp85
• Don Moore's murex85
• Donald Duck shrimp85
• Donax85
• Donax-like tellin85
• Donkey dung sea cucumber85
• Donkey thorny oyster85
• Donkey's ear abalone85
• Doriopsilla85
• Doris veiled shrimp85
• Dorodotes shrimp85
• Dorothy's Fiddler Crab85
• Dosinia85
• Dosinia lucine85
• Dot-rib puncturella85
• Doto85
• Dotted bristle sea slug85
• Dotted dove shell85
• Dotted periwinkle85
• Dotted snapping shrimp85
• Double spiral worm85
• Double-ear bobtail85
• Double-edged keyhole limpet85
• Double-forked plexaurella85
• Double-lined horny sponge85
• Double-lined sea slug85
• Double-ringed flabellina85
• Double-rowed sea urchin85
• Double-snouted volva85
• Double-star coral85
• Doubletoothed hydroid85
• Doubtful Cone85
• Doughboy scallop85
• Doughnut sea rod85
• Dove shell85
• Downy hermit crab85
• Downy venus85
• Dragon cowrie85
• Dressed deep-sea shrimp85
• Drifter crab85
• Drillia85
• Drop-covered cowry85
• Droppings cowry85
• Drummond's sea cucumber85
• Dry sea feather85
• Drygalski's sea urchin85
• Du Petit's spindle85
• Dubious dorid85
• Dubious Finella85
• Dubious sea cucumber85
• Dubious volute85
• Dubois' sea snake85
• Ducal thorny oyster85
• Duchassaing's colonial anemone85
• Duck barnacle85
• Duck's foot85
• Duckbill tagelus85
• Duerden's sun anemone85
• Dujardin's slime sponge85
• Dumeril's clam worm85
• Dun sentinel85
• Duncan coral85
• Dunce cap limpet85
• Dunker's Dosinia85
• Duplex murex85
• Duplicate auger85
• Duplicate turret85
• Durable venus85
• Dusavel's cone85
• Dushia Flabellina85
• Dusky brown taringa85
• Dusky dolphin85
• Dusky hydroid85
• Dusky macron85
• Dusky nembrotha85
• Dusky nerite85
• Dusky sea snake85
• Dusky stiliger85
• Dusky tegula85
• Dwarf ascidian85
• Dwarf astarte85
• Dwarf Atlantic planaxis85
• Dwarf auger85
• Dwarf baby ear85
• Dwarf balloon aeolis85
• Dwarf blind lobster85
• Dwarf bobtail squid85
• Dwarf cup coral85