Here are 100 generated carbon-based life forms:
Methanotrophs - Microbes that metabolize methane as an energy source.
Chlorovores - Organisms that use photosynthesis with chlorophyll on ocean worlds. 
Siliconivores - Lifeforms that consume silicates for nutrients.
Ammonoidea - Prehistoric cephalopods with spiral shells.
Tree octopuses - Arboreal cephalopods that camouflage as foliage.  
Hexapodes - Six-limbed vertebrates, like insects but larger.
Selachimorphs - Shark-like aquatic predators with skeletons of cartilage.
Pterosapiens - Intelligent flying humanoids with winged arms.
Panthropods - Insect-like hive creatures with human-level intelligence.
Ruinents - Species that rapidly inhabit abandoned alien structures. 
Vacuivores - Organisms that feed by sucking nutrients through proboscis tubes.
Radiovores - Creatures that consume ambient radiation for energy.
Floaters - Buoyant zeppelin-shaped animals floating in dense atmospheres.
Tunnelers - Vermiform organisms that bore through solid rock. 
Plasmacytes - Amorphous protoplasmic cells combining into complex lifeforms.
Aquashapers - Semi-aquatic species that sculpt riverbeds and shorelines.
Magmadiles - Lava-dwelling silicate-based organisms.
Skimmers - Legged torpedo-shaped creatures that travel on water surface.
Kitefins - Wide-bodied aerial fish that leap and glide on wind currents.
Spinnerets - Species covered in spinning whisker-like appendages.
Web builders - Species that spin complex webs for navigation or food capture.
Cryophages - Organisms with antifreeze that consume frozen chemicals.
Sandskaters - Legged arthropods that skim across dunes. 
Pedalfloats - Creatures that walk on land and float on water using foot membranes. 
Photomorphs - Light-sensitive organisms that change form/color in response.
Telekinetics - Species with ability to move objects at a distance with the mind.
Floaterherds - Communities of buoyant creatures that float together.
Jetters - Creatures that propel through air/water via jet propulsion.
Tesseracts - Four-dimensional animals that periodically phase in/out of 3D.
Prismatics - Creatures covered in light-refracting surfaces.
Vacuumorphs - Organisms evolved to survive vacuum environments. 
Shieldbearers - Species with plate-like coverings for defense.
Spore clouds - Airborne colonies of small organisms forming mist-like swarms.
Contour camouflage - Creatures able to blend into the shape of surroundings. 
Lightning eaters - Species that survive by absorbing electricity.
Driftcrawlers - Organisms evolved to crawl sideways under fierce winds. 
Aerial grazers - Airborne filter feeders that ingest airborne particles.
Trillimolds - Species that communicate via bioluminescent pulses. 
Duneclimbers - Laterally moving arthropods adapted for climbing sand.
Skeletalites - Mineral-plated species with external bone formation.  
Suctionfeet - Legged species with suction-cup feet for gripping vertical or inverted surfaces.
Rotifers - Microscopic wheel-shaped pseudopods for locomotion.
Tumblegrowths - Plankton-like species that cluster when threatened. 
Aeroflyers - Lighter-than-air gasbag creatures that soar the skies. 
Puzzleforms - Modular organisms whose parts can separate/rejoin.
Buoyantsacs - Floating creatures filled with lighter-than-air gases.
Bristletoes - Species with adhesive setae on feet specialized for steep/vertical surface climbing. 
Prismotes - Bioluminescent species with light-refracting skin.
Photosailers - Plant-animal hybrids that use flat photosynthetic sails to float.
Magnetosensors - Species able to detect magnetic fields for navigation.
Windjammers - Creatures with flat bluff bodies to resist fierce winds. 
Antiplants - Root-like fungal organisms that spread underground. 
Motilemoss - Creeping moss-like species able to move to new ground. 
Lithofungi - Fungal creatures that slowly tunnel through rock.
Cometspawn - Organisms adapted for surviving travel through space.
Extremaloids - Species engineered to survive extreme conditions.
Exobionts - Alien organisms seeded on lifeless planets.
Megamycetes - Massive fungus-like organisms.
Neurozoa - Primitive neural net organisms that form collective intellects. 
Schizophytes - Bacterial colonies in a variety of environmental conditions.
Plankterae - Plant/animal hybrid drifters feeding off cosmic dust.
Asterozoa - Small aquatic invertebrates specialized for microgravity. 
Panspermiotes - Hardy organisms deliberately seeded through space.
Protovores - organisms feeding off primordial organic chemicals. 
Deimos moss - Plant life evolving coloration to absorb light shifted by iron oxide dust.
Umbrals - Species dwelling near shadowed polar regions of airless bodies.
Nullgravitons - Creatures naturally adapted to zero gravity environments.
Magnetovores - Organisms which consume metals and minerals for sustenance. 
Exoskeletals - Armored species with external bone-like formation.
Plasmavores - Lifeforms that consume ionized gases for nutrients.
Subacquatics - Intelligent swimming humanoids evolved underwater.  
Aerotropes - Plant-animal hybrids that float using gas bladders.
Metamorphanes - Species undergoing complete metamorphosis life cycles.
Biolumineers - Species using bio-light for communication, lures, camouflage. 
Sporalgae - Part fungal, part plant species drifting through atmospheres.
Floraflyers - Plant/animal species that fly with petal-like wings.
Photosymbionts - Plants with leaf-like scales housing photosynthetic symbiotes. 
Magnetobacteria - Microorganisms that align along magnetic fields.
Pansmermbionts - Microscopic organisms deliberately spread through space.
Ionobionts - Microscopic creatures energized chemically by free-floating ions.
Chemosymbionts - Organisms that live cooperatively with chemotropic bacteria.
Nullifiers - Creatures able to generate personal force fields and nullify inertia.  
Vermiforms - Worm or snake-like species.
Radiotherms - Creatures that bask in stellar radiation for warmth.
Skimmerplankton - Miniature ocean skimmers forming vast swarms.
Neural nets - Clusters of organisms linking neurons into group mind networks.
Microxygenizers - Bacteria that split water into oxygen and hydrogen. 
Magnetoflyers - Organisms propelled by ferromagnetic fields.
Chemosails - Manta-like floaters with wings of color changing material.
Radiants - Bioluminescent flyers with glow that intensifies in low light.
Plasmajellies - Semi-transparent balloon creatures that float on hydrazine layers above hydrocarbon lakes.
Aerochutes - Feathered/membranous creatures that parachute on wind currents through dense atmospheres. 
Siliconivores - Lifeforms that process silicates for structural and metabolic purposes.
Tidal gliders - Wide-bodied aquatic organisms specialized for using tidal forces for locomotion.
Exocellinids - Single-celled, free-floating creatures forming colorful swarms.
Magnetocephalopods - Squid-like creatures that orient and propel with magnetically-sensitive tentacles.
Pseudomimics - Leaf-like lures that resemble plant life but actually belong to ambush predators.  
Xenofungus - Precursor lichen-like growths adapted to spread to new planets.
Planktonivore chains - Multiple species linked in symbiotic food webs, optimized for passage through space clouds.
Photosailers - Plant/animal hybrids that sail cosmic currents using flat photosynthetic membranes.
Asterozooplankton - Microscopic aquatic invertebrates inhabiting the microgravity environment under kilometer thick ice shell of Dione.
Neurosymbionts - Neural net organisms that spread collective thoughts between linked individuals.
Hydroskimmers - Water striders adapted for skimming the hydrocarbon lakes.
Silicavores - Extremophiles capable of deriving metabolic energy from consuming silicates.
Exoherders - Social species behaviorally optimized for sustaining generations on millennia-long interstellar journeys.
Magnetosensitive avioids - Bird-like creatures able to detect planetary magnetic fields for navigation over vast distances.
Astroplankton - Free-floating diatom-like organisms naturally optimized for surviving interstellar travel.
Subsurface chemotrophs - Microbial communities deriving energy through chemical reactions with subsurface radicals and volatiles.
Nullgravitons - Species evolved innate mechanisms to operate normally in zero or micro-gravity environments. 
Photosynthetic zeppelins - Buoyant barrel-shaped creatures with solar sails running longitudinally along their dorsal ridge.
Bioluminescent pulsars - Deep sea creatures that produce rhythmic bioluminescent displays for communication and attracting prey.
Siliconocellulars - Microscopic and single-celled but with distinct specialized silicon-doped compartments akin to organelles.
Magnetotaxic anaerobes - Microaerophilic bacteria-like organisms capable of detecting and aligning with magnetic fields.
Extremophilic aerobes - Microbial species capable of deriving metabolic energy solely from atmospheric compounds and stellar radiation.
Xenofungal sporer mats - Precursor lichen-like carpet growths designed for low-cost spreading to new planetary environments. 
Chemotroph chiropteroids - Bat-like creatures able to energetically sustain flight through chemosynthesis. 
Hibernating diapause cysts - Microscale species capable of entering multi-century dormant phases awaiting ideal growth conditions.
Subsurface lithoautotrophs - Ecosystems of organisms subsisting entirely on geothermal chemical energy sources independent of stellar radiation.
Piezoelectric aerozooplankton - Minute crystalline creatures that passively float on high altitude winds while converting mechanical strain to electric current.
Industrial melanism moths - Insectoid species exhibiting evolutionary dark pigmentation in response to settling on planets undergoing industrialization by prior civilizations.  
Extreme-tolerant lichen - Fungus-algae symbionts capable of surviving exposure to space, vacuum, and temperature extremes.
Capillary syphonophores - Colonial marine hydrozoans capable of active pumping and canal circulation between polyp zones to counter microgravity effects.
Chemosynthetic bivalves - Mollusks able to derive metabolic energy from oxidation of inorganic compounds such as sulfides or methane.
Subsurface lithoautotrophs - Ecosystems of organisms subsisting entirely on geothermal chemical energy sources independent of stellar radiation.
Magnetosensitive cephalochordates - Fish-like creatures able to biominerally detect magnetic fields for navigation.
High altitude endolithic fungal mats - Slow-growing lichen-like carpets able to photosynthesize despite high doses of ionizing stellar radiation. 
Xerophilic arachnoidism cryptobiotes - Eight-legged arthropod species capable of entering a metabolic stasis to survive extremely arid conditions.
Radiotolerant extremophiles - Species capable of withstanding hundreds of times more ionizing radiation than humans.
Piezoelectric aeroplankton - Winged insect-like creatures passively floating in the upper atmosphere that convert ambient mechanical stress to bioelectricity.
Chemosynthetic lithotrophs - Ecosystems of organisms able to derive metabolic energy from inorganic substrates and chemical reactions occurring in rocky subsurfaces. 
Psychrophilic methanogens - Cold-adapted archaebacteria-like microorganisms able to metabolically produce methane in freezing conditions.
Magnetic biomineralization avians - Bird-like creatures able to ingest and concentrate metallic compounds to detect planetary magnetic fields.
Piezoluminescent biosignaling cephalopods - Squid-like creatures able to emit light through mechanical stress on their crystalline tissue structures.
Extreme halophile endoliths - Salt-adapted lithobiontic microorganisms able to survive desiccation and saturating salinity levels.
UV-resistant aerial biota - Organisms evolved DNA repair mechanisms and photoprotective pigments to survive high doses of stellar UV radiation.
Magnetotaxic aquatics - Pelagic ocean organisms passively aligning with magnetic field lines for vertical migrations and navigation.
Chemosynthetic chthonotrophs - Subsurface species able to derive energy from minerals and inorganic gases independent of light.
Anoxic thermotolerant autotrophs - Heat-loving bacteria-like organisms able to photosynthesize using only geothermal radiation spectra.
Robust interplanetary hibernation spores - Microbial sized species able to survive dormant in space up to galactic cosmic ray exposure levels.
Piezoelectric fuzzy cycliophorans - Symbiotic micro scale organisms that generate electricity from ambient mechanical stresses while clinging to trichomes of larger motile hosts.
Subnivian lithotrophic cryptoendoliths - Microscopic rock-dwelling autotrophs able to derive energy from weathering processes in subsurface interstitial pores.
Extremophilic chemoautolithotrophs - Ancient archaea-like microbes able to build biomass from atmospheric ammonia, carbon dioxide and chemical energy.
Piezophotic onychophorans - Millipede-like creatures that luminesce via mechanical compression of their legs while walking or burrowing.
Plasmasymbiotic aerofloating siphonophores - Colonial gas-bladdered marine hydrozoans housing bioluminescent intracellular symbiotes excited by ambient atmospheric plasma streams.
Magneto gravitactic cytophaga - Rod-shaped bacteroidetes utilizing magnetic particles to gravitate while orienting their motility to geomagnetic field lines.
Subzero cryophotic cryptoendolithic chloroflexi - Cold-loving anaerobic bacteria embedded in rocky glasses and ices, able to photosynthesize using far infrared radiation. 
Piezoluminescent barophilic marine hatchetfish - Bioluminescent finned deep sea fish able to emit light from mechanically stressed photocytes when hunting and attracting mates at extreme pressures.
Plasma-hardened spore forming thallophytes - Silica-reinforced microscopic plant-like species capable of going dormant for eons until activated by incident ionizing radiation from cosmic plasmas.
Piezo-organolectric zero-g hydromedusae - Jellyfish-like species able to gently propel themselves in zero gravity conditions by utilizing self-generated electrical currents from periodic mechanical deformations of their mesoglea.