Time to write a list of theory why these lovely animals drop dead instantly...speculate!
Quoting: Anonymous Coward 8059141 There is no truth or mercy
Or knowledge of God in the land.
By swearing and lying,
Killing and stealing and committing adultery,
They break all restraint,
With bloodshed upon bloodshed.
Therefore the land will mourn;
And everyone who dwells there will waste away
With the beasts of the field
And the birds of the air;
Even the fish of the sea will be taken away.