Initial Indonesia media reported giant carcass washed up on a beach in central Maluku province a giant squid.
Asrul Tuanakota, 37, said that he initially mistook the huge fleshy blob for a stranded boat, the newspaper reported.
The massive carcass was found on Hulung Beach on Serum Island on Tuesday night by a local man, Jakarta Globe reported.
Locals first shared images of the carcass, measuring about 15 meters (50ft) in length, on Wednesday.
The animal is believed to have been dead few days earlier and Indonesia’s Marine and Coastal Resources Management said it was likely to be a whale.
Lab tests are underway to confirm the species.