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Larval Leaf Scorpionfish

A crystal fish.

Larval Leaf Scorpionfish (photograph by Chris Newbert, Minden Pictures). Lacking any other defense, many larval fish have adapted transparency as a method of camouflage—such as this tiny, see-through larval leaf scorpionfish in Hawaii.

PRETTY BETTA — with Guatemala Acuariu

Betta Fish Make A Great Family Pet Hobby

Royal Blue Crowntail Betta - Looks just like my first boy Stewie! Had him 3 years from the store!

A young cusk eel (Brotulotaenia sp)

A young cusk eel (Brotulotaenia sp) collected by Sea McKeon, ID by Benjamin Victor Moorea, French Polynesia

The Oarfish can grow as long as 56 feet.

More Pics of the Amazing Oarfish.

The Oarfish is a rare, solitary, and giant denizen of the ocean depths (arguably larger than a Whale Shark. (The as opposed to the Whale Shark, in the Guinness Book of World Records.)) and is a filter feeder, comfortable cruising at depths of 200 m.

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.  From Funny Little World

Underwater Photography: Pacific Black Dragonfish, Monterey Bay, California

How did an underwater photographer get this photo of a Pacific black dragonfish (Idiacanthus antrostomus)? He was part of a project documenting deep-sea animals found in Monterey Bay, California.

21 Strange, Real-Life Animals

The transparent-headed fish. With a head like a fighter-plane cockpit, a pacific barrel eye fish shows off it's highly sensitive, barrel like eyes topped by green orblike lenses.

A collection of 'colour x-ray' deep sea photographs of rare squids, jellyfish   and shrimp, taken by Joshua Lambus off the coast of Kailua-Kona, Hawaii.

Luminous creatures: Glowing deep sea creatures photographed by Joshua Lambus

Luminous creatures: Glowing deep sea creatures photographed by Joshua Lambus - Telegraph! I just learned this in my oceanography course!

Tropical Dreams: Philippines - Underwater Wonder World

"Anemone City" by Henry Jager. From the dive site Anemone city at Wadi Gimal, Red Sea, Egypt ─ In this picture: Two-banded Anemonefish, Amphiprion bicinctus