“When you go to the deep sea, every time you take a sample, you’ll find a new species,” says marine biologist Ward Appeltans. In one recent year, scientists identified 1,451 new types of undersea life. We simply don’t know the half of what’s down there.

In Job 38, God reviewed His creation for Job’s benefit. In three poetic chapters, God highlighted the wonders of weather, the vastness of the cosmos, and the variety of creatures in their habitats. These are things we can observe. Then God spoke of the mysterious Leviathan—for an entire chapter. Leviathan is a creature like no other,…