Species

The world of Steven Universe is filled with many different and unique creatures. This is a list of known species.

Gems
Gems are a humanoid species of magical alien beings. They have many and varied abilities, but all share the trait of having a magic crystal embedded somewhere on their body from which they can summon a special weapon. These also are the core of their being, as the bodies we see are just projections that have mass. Gems have the power to shapeshift and are genderless, but still use female pronouns. Steven is the first gendered Gem because he is half human. Gems have special abilities, like psammokinesis, future vision, or fire resistance.

Crystal Gems

 * Amethyst
 * Garnet (fusion Gem)
 * Pearl
 * Rose Quartz (inactive)
 * Steven Universe (half Gem)
 * Sapphire (fused)
 * Ruby (fused)

Homeworld Gems

 * Lapis Lazuli (fused)
 * Peridot
 * Jasper (fused)
 * Yellow Diamond

Fusion Gems

 * Opal
 * Sugilite
 * Alexandrite
 * Stevonnie (one-Fourth)
 * Malachite (unknown status)
 * Rainbow Quartz
 * Sardonyx
 * Garnet (active)

Humans
Humans are the most populous sentient species on Earth. The humans in Steven Universe seem to be aware of the magical creatures and happenings around them and coexist with them.
 * Steven (half human)
 * Greg Universe
 * Lars
 * Sadie
 * Mr. Fryman
 * Peedee Fryman
 * Ronaldo Fryman
 * Jamie
 * Sour Cream
 * Onion
 * Connie Maheswaran
 * Mr. Maheswaran
 * Dr. Maheswaran
 * Kofi
 * Kiki
 * Jenny
 * Nanefua
 * Greg's Uncle (deceased)
 * Greg's Aunt (deceased)
 * William Dewey (deceased)
 * Yellowtail
 * Mr. Smiley
 * Suitcase Sam
 * Bill Dewey
 * Buck Dewey
 * Stevonnie (three-fourths)
 * Barbara
 * Vidalia
 * Marty
 * Kevin

Miscellaneous Magical Creatures

 * Lions:
 * Lion
 * Sentient Plant Life:
 * Watermelon Steven
 * Baby Melon
 * Whales:
 * Tiny Floating Whale (cloud creation)

Miscellaneous Non-Magical Creatures

 * Goats
 * Steven Jr.
 * Steven Jr.'s kids
 * Steven The Third


 * Snakes
 * Onion's Snake


 * Lobsters
 * Butt Lobster

Corrupted and Broken Gems
Technically not a different species, Corrupted Gems were once normal Gems, but have been corrupted and/or have become broken. Corrupted Gems no longer have the anthropomorphic appearance that normal Gems share, instead they look more feral or monstrous.
 * Watermelon Tourmaline
 * Worm Monster
 * Centipeetle Mother
 * Gem Cave Creature
 * Ice Monster
 * Invisible Gem Monster
 * Lighthouse Gem Monster
 * Big Bird
 * Water Bear
 * The Slinker
 * Gem Cave Creature
 * Crab Gem Monster
 * Heaven Beetle
 * Earth Beetle
 * Desert Glass
 * Unknown Giant Gem Monster

Corrupted Gem's Minions

 * Drill Parasites
 * Centipeetles

Other Gem-like Creatures

 * Crystal Shrimp
 * Crystal Basilisk

Electric Skulls

 * Electric Skulls (non-canon)

Ornithological monsters

 * Unknown Giant Bird (mentioned in "Cheeseburger Backpack")
 * Giant Bird Egg ("Cheeseburger Backpack")

Spirits

 * Smoke Monster

Robots

 * Robot Shooty Thing


 * Flask Robonoids
 * Plug Robonoids
 * Red Eye

Plants

 * Watermelon Stevens
 * Magic Moss
 * Magic Spike Vines ("An Indirect Kiss")

Forced Fusions

 * The Cluster

Lights

 * White Light
 * Red Light
 * Yellow Light
 * Indigo Light
 * Green Light
 * Blue Light
 * Orange Light