Early settlers in north NSW had dragon problems. Bundjalung magil means 'Dragon (Eastern Water Dragon) Physignathus  leseuerii.'  'Moggill Creek was named after the water Dragon – Magil in the local Yuggera (Jagera) Nation language' of Brisbane.
https://www.moggillcreek.org.au/wp-content/uploads/2025/09/Newsletter-Spring-202...

Old Java language of Indonesia has: mahāgila  'a kind of sea-monster' which possibly became magil for smaller variants. The Javanese hero Bhima fought a dragon in the Southern Ocean.
https://www.gustibali.com/dewa-ruci-statue/

Indonesia's naval forces were involved.https://link.springer.com/article/10.1007/s41636-023-00390-7

It's possible that suspected shark attacks were by a mahagila, from Sanskrit words meaning 'great swallowing'. The number of sailing-ship wrecks is also suspicious.