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A beachgoer got quite the slithery surprise when a 20 - inch - long ( 50 centimeters ) deadly sea snake washed ashore at Coronado Dog Beach near San Diego Tuesday ( Jan. 12 ) .

Theyellow - bellied ocean snake(Pelamis platura ) is very uncommon in California , but three ( including this latest sighting ) have wash ashore in Southern California in the retiring few month .

A venomous sea serpent washed up on a Coronado beach on Tuesday, Jan. 12, 2016.

A venomous sea serpent washed up on a Coronado beach on Tuesday, Jan. 12, 2016.

The beachgoer who discover the yellow - bellied sea Snake River Tuesday alert lifeguards to the serpent at around 2:30 p.m. local clock time , according toa instruction from the city of Coronado . They place the unenrgetic serpent in a bucket , but just like the other snakes of that coinage that have dampen up recently on California beaches , it died presently afterward . The serpent has since been turned over to the Scripps Institution of Oceanography .

Usually found in the tropical character of the Pacific and Indian Oceans , include the western coast of Central America , Hawaii , Japan , and the eastern coast of Africa , these snakes have striking yellow bellies that serve well as warning signals to other brute that they are venomous , mean they come in a toxic subject matter when they bite a person or other animal . No human dying have ever been reported as a result ofP. platura . [ See Photos of Snakes from Around the reality ]

Greg Pauly , assistant curator of herpetology at the Natural History Museum of Los Angeles , antecedently tell apart Live Science that yellow - bellied sea snakes baffle minuscule scourge to humans because their venom , fangs and small mouth sizing are better suited to smaller prey , such as tiny Pisces the Fishes . Still , officials and expert advise masses to keep their distance if they add up across one of these snake in the grass .

The snake the washed ashore on a Coronado beach is a yellow-bellied sea serpent, a species that is highly venomous.

The snake the washed ashore on a Coronado beach is a yellow-bellied sea serpent, a species that is highly venomous.

In total , only six xanthous - belly out ocean snakes have ever been reported north of the tip ofBaja California , Mexico , Pauly said . Two were found on California beaches in 2015 — one on Oct. 16 at Silver Strand Beach in Ventura County , and the other on Dec. 12 at Bolsa Chica State Beach in the south of Los Angeles . Prior to that , the last report sighting occurred in 1972 .

Although experts are surprised by the sudden surge ofP. platurain this area , the cause is relatively clear : Warmer waters in the equatorial Pacific Ocean , triggered by El Niño , make for many unexpected tropic species northward through a premix of rising sea - surface temperature and altered current , expert say .

" In cosmopolitan , we see Pisces moving northward that are unusual in these areas — like hammerhead sharks or dolphin — and it ’s unusual to see the snakes , but not unexpected when you have these really warm waters from the El Niño effect , " said Karen Martin , a professor of biota at Pepperdine University in Malibu , California .

blue blob-shaped dead creatures on a sandy beach

What is less clear is why these snakes are washing up on beaches . Yellow - belly sea snakes do n’t move well on land , so if they ’re on the shore , it is a polarity they are sickly , Martin order . " [ It ] probably shine the tenseness of them being far from home and maybe the travel — and possibly that they ’re fuck off out of their natural orbit and make difficulty as they get farther north , " she said .

Sea Hydra sightings may be uncommon in Southern California , but they are n’t the oddest puppet spot in the expanse . In 2013 , an 18 - foot - farsighted ( 5.5 meters)dead oarfish washed upon Catalina Island , followed a few Clarence Day after by a smaller Regalecus glesne landing on a beach near San Diego . That was n’t the destruction of the surprise : When scientists took a look inside the smaller oarfish , they discover hundreds of 1000 of eggsin the animal ’s ovaries .

The Natural History Museum of Los Angeles requests that , if you do see a yellow - belly sea Hydra , you account the sighting , along with a pic and a verbal description of the location , tonature@nhm.org .

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