Giant Amphipod

They have been found at depths of 500 m. It has a completely transparent body, with the exception of its stomach and its compound eyes. The eyes occupy the entire top of its head, and the retinas can be seen as a thin layer of red in the otherwise clear head.

Dragonfish

The deep sea dragonfish is a ferocious predator in spite of its small size. The dragonfish has a long barbel attached to its chin. This barbel is tipped with a light-producing organ known as a photophore. These fishes are sexually dimorphic (the males and females look different). Dragonfishes live in deep ocean waters at depths of up to 1500 m (5000 feet).

http://www.allthesea.com/Deep-Sea-Fish-Dragonfish.html

Hairy Angler

The hairy angler is the size of a beach ball and its body is covered in long antennae designed to pick out the movements of any prey foolish enough to venture close to its terrifying teeth.

http://en.wikipedia.org/wiki/Anglerfish

Gulper eel

A gulper eel engulfs its prey in its huge, pelicanlike mouth. It can unhinge its enormous jaws and stretch its stomach to consume a fish as big as itself. They are generally black in color, and can grow to lengths of 2 m (6.5 feet). They have been found at depths of 1,800 m (6,000 feet). Their tails are tipped by a luminous bulb-shaped organ.

http://www.mbayaq.org/efc/living_species/default.asp?inhab=186

Fangtooth

While understandably named for their disproportionately large, fang-like teeth and unapproachable visage, fangtooths are actually quite small and harmless to humans. They are more commonly found between 200 - 2,000 metres (660 - 6,560 feet). Fangtooths are known to be robust when compared to many other deep-sea fish; they have been kept alive for months in aquariums despite conditions which are significantly different from their natural habitat.

http://en.wikipedia.org/wiki/Fangtooth