PHDID YOU KNOW? 
The most venonmous fish in the world is the 30cm Stonefish.
The stonefish is the most venomous of all fish. It can produce venom that’s most lethal to humans; it can hide in its surroundings; it can do a lot of incredible things you may not expect from a fish.
In the underwater world, you don’t have to be the largest creature to be the biggest treat. Despite measuring at only 30 to 40 centimetres, the venom that the stonefish produces is some of the most venomous in the world and is fatal to not just marine animals but humans too.
For a complete recovery, a sufficient amount of anti-venom is required to quickly reverse the effects.
(s)blueplanetaquarium