Species: blue dragon slug

The blue dragon slug (also known as Glaucus or the blue sea dragon) is a genus of nudibranch.

The blue dragon slug makes use of countershading: the blue side of their body faces upwards, blending in with the blue of the water. The silver/grey side of the sea slugs faces downwards, blending in with the sunlight reflecting on the ocean's surface when viewed facing upwards underwater.

Glaucus includes five distinct species, though nearly visually identical, thus forming a species complex.

Glaucus - From Wikipedia, the free encyclopedia

The following tags are aliased to this tag: blue_sea_dragon, glaucus_atlanticus (learn more).

This tag implicates nudibranch (learn more).

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14_legs 2024 abella_(fear_and_hunger) accessory alternate_universe animal_humanoid aquatic_gastropod arthropod asterozoan august_(fear_and_hunger) bikini bikini_top black_body black_clothing black_hair black_skin black_spots black_stripes black_tail black_topwear black_vest blonde_hair blue_dragon_slug blue_tail boxfish bra brown_hair camera cephalopod cephalopod_humanoid cetacean chest_scar cigarette clothed clothing clownfish cnidarian coleoid colored covering covering_self crossed_arms crustacean curled_hair daan_(fear_and_hunger) dolphin dorsal_fin echinoderm edited_base eel eye_patch eyebrows eyewear facial_hair fear_&_hunger_2:_termina fear_and_hunger female fin fish gastropod gesture giant_pacific_octopus glasses glistening glistening_hair green_bikini green_bikini_top green_clothing green_fin green_swimwear green_tail grey_background grey_hair group gulper_eel hair hand_on_hip hand_on_own_face hand_on_own_head hand_on_own_hip hands_on_own_hips hands_on_own_tail hat headband headgear headwear henryk_(fear_and_hunger) holding_camera holding_cigarette holding_object holding_plate holding_staff humanoid humanoid_merfolk jellyfish karin_(fear_and_hunger) leafy_seadragon levi_(fear_and_hunger) lionfish lit_cigarette long_hair looking_at_viewer looking_down malacostracan male mammal mantis_shrimp marcoh_(fear_and_hunger) marina_(fear_and_hunger) marine marine_humanoid markings medusozoan merfolk mollusk mollusk_humanoid moon_jellyfish multi_leg multi_limb multicolored_tail muscular muscular_humanoid muscular_male mustache navel nipples no_bra nudibranch o'saa oarfish oceanic_dolphin octopodiform octopus octopus_humanoid octopus_merfolk olivia_(fear_and_hunger) one_eye_closed orange-lined_triggerfish orange_fin orange_tail orca pale_skin pav_(fear_and_hunger) pigtails pomacentrid ponytail purple_body purple_hair purple_skin purple_tail purple_tentacles red_bra red_clothing red_fin red_hair red_headband red_legs red_tentacles red_underwear robe salute samarie_(fear_and_hunger) scar scorpaeniform sea_slug seadragon_(fish) shirtless shirtless_humanoid shirtless_male shoggothslime short_hair shrimp simple_background slug smoke split_form spots spotted_garden_eel spotted_markings spotted_tail sprite sprite_art staff starfish starfish_(accessory) starfish_bra striped_markings striped_tail stripes swimwear syngnathid syngnathiform tail tail_fin tail_markings tanaka_(fear_and_hunger) taur tentacles tetraodontiform toothed_whale topwear triggerfish two_tone_tail underwear vest white_bikini white_bikini_top white_body white_clothing white_skin white_stripes white_swimwear white_tail wink yellow_boxfish yellow_clothing yellow_fin yellow_hat yellow_headwear yellow_robe yellow_stripes yellow_tail
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