Sky News reported, the unidentified creature, which measured 4.5 metres (15 feet) in length, surprised local residents.
The carcass, believed to be that of a sea cow, according to the Bureau of Fisheries and Aquatic Resources (BFAR) Manila, washed up on a beach in Barangay Poblacion, Cagadianao.
Several suggested that the beast could be Appa, a fictional character from the Nickelodeon animated television series Avatar: The Last Airbender.
Austin Blanch@austinblanch tweeted saying: ‘Yhink it’s appa. Or a big Shitzu. I could be wrong.’
While another Twitter user, J Flow, said: ‘It’s that creature from The Neverending Story.’
The creature was already in a state of advanced decomposition when found.
Teodoro L. Alipayo, who took these videos and pictures, told Reuters that a sample of the specimen has been taken to BFAR Manila for laboratory experimentation to determine the species and cause of death.The carcass has a total length of 6.3 meters (20.6 feet), excluding the tail which is missing, and a total width of two meters (6.6 feet) from the dorsal to pectoral fin.
Alipayo said that the bones are being preserved as a memento of this rare event.
Cheeck out a video of the Mysterious sea creature below.