Flower Hat Jellyfish

The term jellyfish encompasses about 1,500 species, ranging in size from microscopic to more than seven feet wide and 100 feet long. These are purple-lipped cross jellyfish.

Golden nudibranch looks like a caterpillar of the sea by Mona Dienhart @ monaand chris.com

By Ricardo Araujo on flickr

By vanveelen on flickr

The Fiery Sea Slug, Flabellina goddardi, discovered in 2008 by Marine Biologist Jeff Goddard. It lays a lacy egg mass that hatch into tiny babies. The egg mass is formed that way so that each baby receives enough oxygen.

An Elegant Sapsucking Slug, racing slug-fashion across a bed of encrusting sponge. From Lembeh Strait, Sulawesi, Indonesia.  By Ned Deloach at Wetpixel.

A sea bouquet, Sea Tunicates Blue and Strawberry by OceanwideImages

By mandarinfish on Flickr, Linda Cline

Purple ring topsnail. Barkely Sound, B.C. Canadá by randapex on Flickr

Coral, Ricordea yuma

Crinoid. In case you’re wondering, it’s an animal, not a plant.

Another plant-like sea animal. Wish I knew the name.

This is a worm!  Amazing blue and red Christmastree worm, by nialldeiraniya on Flickr

Fire Urchin

Ascidian – Sea Squirts by indr on flickr, Leander Wiseman

By Jaques de Selliers at Scuba-photos.net

Garden eels in Sulawesi, Indonesia. I can see how they got their name.

Cirrate octopod – or Dumbo

Barreleye the Barreleye fish has a completely transparent head. Looks like leaves in its brain.

Baby thornback ray

Puffer fish by peentho266 on Flickr

Party Balloon Balloonfish on Calabas Reef, Bonaire.

Guineafowl Pufferfish (Arothron meleagris), Moa in Hawaiian

Helmet Urchins, or Shingle Urchins and in Hawaiian are called kaupali which translates to cliff hanging These urchins are found in the harsh intertidal zone of the volcanic shores of Hawaii.

Bat Fish

Sea Jewel by Holly Berry Shots

Clown Triggerfish by Brian Mayes on flickr

Male cardinal fish carrying his babies.

Chromodoris willani are known for their diamond encrusted gills and rhinophores.

pyrosome – luminous deep sea creatures photographed by Joshua Lambus via Telegraph in the UK

Rare Glowing Flower Hat Jellyfish

Janolus cristatus glowing Nudibranch, by Raimundo Fernandez on flickr

Tunicate by mandarinfish, via Flickr, linda cline

Wobbegong sharks, great name.

Xenophora, a marine snail commonly known as the carrier shell, attaches shells, rocks, and other debris from its environment. Amazing.