QuadKrab

QuadKrabs are large, multi-limbed entities descended from deep water crabs. They live in large communities seated in the walls of deep sea canyons and crevacies.

The Loch Ness Monster

The Loch Ness Monster is a famous cryptid which supposedly lives beneath the waves in Loch Ness, in Scotland. Sightings of the creature go back hundreds of years, but it wasn't until the infamous "Surgeon's photo" in 1933 (later proved to be fake) that the creature became known world wide. There are many theories of what the beast could be, the most popular being a relic plesiosaur population from millions of years ago.

I imagine a highly specialized Plesiosaur adapted to living in Loch Ness, mutated through centuries of inbreeding. The large, sensitive eye helps it see through the dark, peat filled water and keeps the creature away from the surface and blinding sunlight. The tentacle like structures on it's chin help it root through the mud along the bottom for hidden prey. The extended growths along it's "ears" are a new type of sensory organ which allows the monster to detect changing water currents and thus approaching fish.

And why a cyclops? Because it looks cool.

GibberWurm

The GibberWurm was a lowly sanitation worker who was contaminated by illegally dumped radioactive waste. The radiation bonded his DNA with a tapeworm parasite which was currently residing in his intestines, transforming him into a strange tapeworm-mutant hybrid.

Mamenako

The Mamenako is a strange, fluted, parasitic alien, which latches onto the skull of a host animal and integrates it's self into the victim's central nervous system. Over the course of several weeks the Mamenako releases specialized enzymes which result in the growth or large egg sacks, in which generate thousands of young. Eventually these egg sacks burst, allowing the young to consume the host animal, before spreading out to find more hosts.

Mamenako are generally considered dangerous vermin by most sentient species, and usually are exterminated on sight. The method by which they spread from planet to planet is currently unknown.

Facecrab

FaceCrabs are the latest innovation in what has become known as the "designer clone" industry. Enterprising individuals can pay exorbitant amounts of money to have their DNA spliced and recombined to give their bodies strange shapes.

Communities of "FaceCrabs" have started autonomous collectives in deep caves beneath the sea. They often find themselves on the receiving end of discrimination due to their chosen "lifestyle."

Propeller Fish

Propeller fish are fish with strange, propeller-like structures on their tales and heads. These appendages allow them to fly through the sky as easily as they can swim through the water.

Glibtick

Glibticks are a race of creatures descended from parasites. They live in large, floating, organic cities, created from a building material made up of genetically engineered bacteria. These gigantic bio-cities float through space for decades until they encounter a planet with compatible life forms, after which they descend to feed on all organic matter. The Glibticks are feared throughout the universe for these planetary raids, but have thus far resisted organized campaigns to subjugate them.

Scradpoles

Scradpoles are small, airborne amphibians that have no hind legs. Like all amphibians they spend the first part of their lives in water, however unlike all others they have a strange ability to fly through the air. The method by which they remain airborne is currently unknown.

Goo-Goo Bug

Strange, clumsy, over-large insects, Goo-Goo bugs were originally genetically engineered with the intention of creating bio-weapons capable of wiping out enemy cities in huge swarms. Due to compound abnormalities in their genetic makeup, the results were less than satisfactory.

Grazaliack

The Grazaliack is a notorious galactic bounty hunter and assassin, known for his brutal methods and ruthless efficiency. He does not use technology when making a kill, but instead chooses to hone his own personal abilities and fighting skills.