Bryce 7 Pro.
I'm a Big Blue Whale, Baby,
Oh yeah, I breach wherever I choose!
Said I'm a Big Blue Whale, Baby,
I doesn't pay no union dues,
But I ain't got no Big Blue Baby,
So I'm singin' you the Big Blue Whale Blues!
That's BlueGenies excellent fish tail freebie, SpacesBones impact ring and a bryce sky from matcreators set. Credit where credit is due. One can get really complex with bryce, but even a couple of freebies and a lil' thought will give you a simple, simply beautiful render.