Crustaceans

Alien species become invasive when their introduction to an ecosystem ends up causing ecological disruption in their new home.

A 520-million-year-old sea creature has been unearthed in Greenland. The ancient Cambrian organism used its comblike appendages to rake the seas for tiny shrimplike foods,

No other animal senses color like the colorful mantis shrimp, which uses 12 receptors to quickly detect colors in its reef environment. The crustacean's eye works like a satellite sensor.

The colorful crustaceans have super vision of sorts, sporting 12 different types of photoreceptors when four to seven are all that is needed.

A translucent underwater cave dweller that looks like a skeleton and travels like an inchworm is the newest member of California's array of marine life.

The bizarre creature combs its hair, not to look good, but to snag dinner.