AnimalsAUG 25, 2015

51 Sea Slugs That Prove Aliens Already Live On Planet Earth

Lina D. and Emma A. Smith

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Seeing how much you liked our "Sea Bunny" and "Sea Sheep" post, we decided to dive deeper to see what else is hidden beneath the sea. We were pleasantly surprised to find that the ocean is full cute slugs!

Most of these “slugs” are actually snails that have lost their shells and gained new characteristics through evolution. For example, sacoglossans are sometimes called “solar-powered sea slugs” because they use chloroplasts from the algae they eat in their own tissue.

Vote for your favorite, or if you happen to be a deep-sea diver, post your own pictures below!

#21 Flabellina

Bright purple sea slug with spiky appendages crawls on underwater plant, showcasing unusual alien-like marine life features.

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22points

#22 Glossodoris Atromarginata

Close-up of a black and white sea slug, showcasing alien-like features in its natural underwater environment.

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22points

#23 Unknown

Close-up of a colorful sea slug with vibrant yellow and blue patterns underwater, showcasing alien-like features.

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22points

#24 Glossodoris Atromarginata

Yellow sea slug with wavy black-edged frills resting on the ocean floor, showcasing alien-like features of sea slugs.

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21points

#25 Donut Nudibranch

Two colorful sea slugs with unique patterns cling to underwater coral, showcasing alien-like features on planet Earth.

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21points

#26 Banyuls Sec Vallenti

Close-up of a vibrant orange sea slug with translucent body and intricate appendages, showcasing alien-like marine life features.

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21points

#27 Mexichromis Multituberculata

Close-up of a sea slug with purple and white markings, showcasing unique alien-like features on a dark background.

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19points

#28 Acanthodoris Lutea

Bright orange sea slug with textured body on a coral reef, showcasing unique alien-like features of sea slugs on Earth.

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18points

#29 Ceratosoma Amoena

Colorful sea slug with red and orange patterns resting on a marine surface, showcasing alien-like features underwater.

Alistair Merrifield

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18points

#30 Phyllodesmium Opalescens

Colorful sea slug with vibrant neon appendages on ocean floor, showcasing unique alien-like features of sea slugs.

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18points

#31 Trinchesia Yamasui Hamatani

Colorful sea slug underwater with bubble-like appendages, showcasing unique alien-like features of sea slugs on planet Earth.

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17points

#32 Chromodoris Strigata

Colorful sea slug with black, white, and orange stripes on ocean floor, showcasing unique alien-like appearance of sea slugs.

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17points

#33 Trinchesia Sibogae

Close-up of a vibrant sea slug underwater showcasing alien-like features in marine life and sea slug diversity.

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16points

#34 Frosted Nudibranch

Translucent blue sea slug with spiky appendages, resembling an alien creature, floating against a black background.

16points

#35 Cuthona Sibogae

Colorful sea slug with vibrant orange and purple spikes resting on sandy ocean floor, showcasing alien-like marine life.

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15points

#36 Phyllodesmium Serratum

Bright pink and purple sea slug with curled appendages resting on dark ocean floor showcasing unusual alien-like features.

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15points

#37 Onchidoris Bilamellata

Close-up of a unique sea slug with bubble-like texture, showcasing alien-like features of marine sea slugs on Earth.

Alexander Semenov

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14points

#38 Okenia Hopkinsia Rosacea

Bright pink sea slug on sandy ocean floor, showcasing alien-like features of unique sea slugs found on Earth.

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14points

#39 Hypselodoris Festiva

Colorful sea slug with blue and yellow patterns and red antennae on the ocean floor showcasing unique alien-like features.

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14points

#40 Phyllidia Ocellata

Colorful sea slug with bright orange and black patterns covered in white bumps on sandy ocean floor, showcasing strange alien-like features.

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14points

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Lina D.BoredPanda Staff