A bait ball, or baitball, occurs when small fish swarm in a tightly packed spherical formation about a common centre. It is a last-ditch defensive measure adopted by small schooling fish when they are threatened by predators.
Sun Fish (aka Mola Mola) are the largest bony fish on earth, up to across, lbs. Their favorite food is jellyfish. They have no tail. At night they often come to the ocean's surface for hours at a time, barely moving. Also called Mola Mola.
The ocean sunfish is the largest bony fish in the world. Rarely seen, adult sunfish typically weigh over a ton. Although it has few natural predators, the sunfish is considered a delicacy in some countries, though banned for sale in the European Union.
Nautiluses are the sole living cephalopods whose bony body structure is externalized as a shell. The animal can withdraw completely into its shell and close the opening with a leathery hood formed from two specially folded tentacles.