sea creature

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Noun1.sea creature - any of numerous animals inhabiting the sea including e.g. fishes and molluscs and many mammalssea creature - any of numerous animals inhabiting the sea including e.g. fishes and molluscs and many mammals
animal, animate being, beast, creature, fauna, brute - a living organism characterized by voluntary movement
bycatch, by-catch - unwanted marine creatures that are caught in the nets while fishing for another species; "thousands of dolphins and porpoises and whales are killed as part of the by-catch each year"
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References in classic literature ?
By the above definition of what a whale is, I do by no means exclude from the leviathanic brotherhood any sea creature hitherto identified with the whale by the best informed Nantucketers; nor, on the other hand, link with it any fish hitherto authoritatively regarded as alien.
This brought the lecturer to the great ladder of animal life, beginning low down in molluscs and feeble sea creatures, then up rung by rung through reptiles and fishes, till at last we came to a kangaroo-rat, a creature which brought forth its young alive, the direct ancestor of all mammals, and presumably, therefore, of everyone in the audience.
Having thus, amid a general titter, played very prettily with his interrupter, the lecturer went back to his picture of the past, the drying of the seas, the emergence of the sand-bank, the sluggish, viscous life which lay upon their margins, the overcrowded lagoons, the tendency of the sea creatures to take refuge upon the mud-flats, the abundance of food awaiting them, their consequent enormous growth.
An "alien-like" sea creature was found on a beach in the United Kingdom and was later identified as a "buoy barnacle," an unusual and reportedly rarely-seen crustacean. A woman taking an evening stroll along Saunton Sands, a beach near Devon County in southwest England, spotted the creature. 
Summary: Actress will take on Karathen, a mythical sea creature, in the superhero movie
Minutes before a tectonic quake with 6.4 magnitude hit Davao region on Saturday, a mysterious purple-color sea creature was washed up on the shore of Island Garden City of Samal, Davao del Norte.
CONSPIRACY theorists are speculating over the appearance of a mystery sea creature captured on video in the River Tyne.
David Harding, 81, realised something fishy was going on when he stepped out of his car to find a tube containing the sea creature stacked on a paving slab.
An unidentified sea creature was floating in the shallow water off Combadao village in this city Thursday morning.
A sea creature sting can usually be treated with first aid but if serious symptoms develop call an ambulance.