The Evangellyfish!

The Evangellyfish is known to be a fish with no backbone.
He stands for nothing and falls for everything.
The Evangellyfish is sort of a jellyfish or a cross between a fish and a mammal.
He is not very hot and not very cold, perhaps more like lukewarm.
If eaten by humans, they quickly spewed them out of their mouth because thy have no flavor.
They float around with other Evangellyfish in schools who like to congregate in dark caves.
Because of their floating behavior they have a reputation to be alive, but are considered by humans as dead.
Only when stirred, by shining a light on them they roar like a mammal and are capable of spitting poisonous venom.
They prowl around in the dark of the sea for their prey and inject them with their venom so that they become like them, ‘Evangellyfish’.
And when they are among the fish of the sea, they skillfully pretend to be one of them.
Evangellyfish are known for their capability to change their appearance, they like to distinguish themselves with outstanding colors and so to demand respect and authority over the rest of the school. They train their subjects to lift them up and honour them with respectful greetings at their gatherings.
They float through many waters and oceans till they have one convert and then they make them twice as jelly as they are, and if anyone does not agree with their tactics, they quickly exclude and ostracize them and even put them to death if possible.