Leviathan is identified as the common hippopatamus in the Amplified study Bible.
Yes, I'm a Christian.
And Leviathan is the whale. Also in the Amplified version.
HTH.
Now why would God be concerned about killing a hippo???
Isa 27:1 In that day the LORD with his sore and great and strong sword shall punish leviathan the piercing serpent, even leviathan that crooked serpent; and he shall slay the dragon that is in the sea.
In that day...And what day is that??? Leviathan is a crooked and piercing serpent...And he's a dragon...And he's in the sea...What sea is that???
What's that about the water that's above the heavons in Genesis??? Above the clouds, above the stars...
Don't believe in dragons??? I do...