A Gloomy Octopus makes a home in a large truck tyre dumped in Sydney Harbour. Gloomy Octopuses are also known as Octopus Tetricus. They are endemic to the Eastern seaboard of Australia and can live in both shallow and in very deep water. Octopuses, like all cephalopods, are highly intelligent and curious. Sadly, their lifespan is at most 2 years. As I dive this site regularly, this octopus and I became allies, if not firm friends