Different penguins species have different ways of attracting a mate. King Penguins, for example, sing long songs with their partners. Gentoo Penguin males give their mates gifts of small pebbles or stones. For penguins, bonding is an important part of raising a chick.
Epidote is a silicate mineral that is often recognized by its pistachio green color. chemical composition, epidote is a calcium aluminum iron silicate. It has a hardness of 6 to 7 on the Mohs scale. One of its distinguishing characteristics is strong pleochroism, where crystals display different colors -- green, brown and yellow -- as they are viewed from varying angles.
The Pacific blackdragon is a deep sea fish, that can be found up to depths of up to 3,300 ft. Female blackdragons are about two feet long and have fang like teeth and a long chin whisker. They are black on the outside, as well as on the inside to prevent light from swallowed bio-luminescent prey shining out. The males are small, about three inches in length, and brownish in color. They have no teeth, no chin barbel and no stomach. Unable to eat, the male lives only long enough to mate.