Chapter 5, "Dangerous Waters," is where some of the more notorious marines species are treated, including the sea wasp (Chironex fleckeri) on which Berra bestows the title "most venomous animal known."
Blue-ringed octopus, cone shells, stonefish, and firefish (also known as lionfish and turkeyfish) are other poisonous creatures presented.
There's the
blue-ringed octopus, the piranha, the black torpedo ray and the Portuguese man-of-war.
The Australian
blue-ringed octopus will be kept in a specially-adapted, heated tank to safeguard its keepers.
In at least one species, Australia's
blue-ringed octopus, the secretion contains a neurotoxin that constitutes the deadliest venom known in nature, capable of killing an adult human in minutes.
Six species of
blue-ringed octopus live in the South Pacific, where they hunt for crabs, worms, small fish, and other prey.