A monitor lizard chased park visitors riding pedalo in a park in Thailand.

Footage shows the reptile swimming on the surface of the pond as it followed behind the swan-shaped paddle boat where the tourists were in Bangkok.

The animal was spotted by their friends who were recording from the banks and shouted to alert them before they drifted away to keep distance.

Asian water monitor lizards normally live in canals, swamps, sewers and ponds in cities in Thailand. They feed on fish, snakes, frogs and scraps of food left by humans.

The reptiles are aggressive when threatened and have a mildly venomous bite which sometimes carries harmful bacteria. The Godzilla-like reptiles are also a protected species in the country so their population thrives.