(Atheris squamigera) variable bush viper Venom not well studied, but likely hemotoxic. Bites rare, but at least one human fatality reported. No specific antivenom currently produced, but good paraspecific neutralization has been reported.
The banded sea krait (Laticauda colubrina) is arguably the most recognizable of the sea snakes. Similar to other sea snakes, the banded sea krait is quite venemous, but not aggressive towards divers. As they need sources of freshwater to survive, they can often be found on land. These snakes hunt in a fashion similar to moray eels, where they wiggle their way into small crevasses and flush prey out. This species is widespread throughout the western Pacific and eastern Indian Oceans.
The Blue-Ringed Octopus is a tiny and extremely venomous cephalopod found in the tropical waters of the pacific. Each individual carries enough venom to kill over two dozen people within minutes. There is no anti-venom. However, they are not aggressive and will flash their brilliant blue rings when threatened, as a warning of their toxicity - photo taken at Wainilu, Rinca Island, Indonesia