#glaucidae

[herpsandbirds]

Blue Dragon Nudibranch (Glaucus atlanticus), family Glaucidae, Sydney, Australia

photograph by Kristian Laine

[have-you-seen-this-animal]

Blue sea dragon!!

Absolutely! I'm surprised we haven't done this one yet!

Have you seen the blue sea dragon (Glaucus atlanticus)?

I have now

Yes, in photos/videos

Yes, irl

I'm not sure

Voting ended onFeb 15, 2025

These are also referred to as the sea swallow, blue angel, blue glaucus, dragon slug, blue dragon, blue sea slug, and blue ocean slug.

[bowelfly]

invertober week 2

[creatureimages]

every time i see a bluebottle or a blue sea dragon posted online all the comments are like "erm... can't that kill you? what the scallop?" my brother in christ venom doesnt always kill you sometimes it's just oof ouch ow. anyway heres a glaucus atlanticus

[birdblues]

Blue Glaucus

[herpsandbirds]

Blue Dragon Nudibranch (Glaucus atlanticus), family Glaucidae, order Nudibranchia

via: 1 Minute Animals

[herpsandbirds]

Blue Dragon Nudibranch (Glaucus atlanticus), family Glaucidae, Maroubra Beach Rock Pools, Sydney, Australia

photograph by @taliagreisphotography

[giraffeinatree]

A Real Life Kyogre

Glaucus atlanticus (common names include the sea swallow, blue angel, blue glaucus, blue dragon, blue sea slug and blue ocean slug) is a species of small, blue sea slug, a pelagic aeolid nudibranch, a shell-less gastropod mollusk in the family Glaucidae.

These sea slugs are pelagic: they float upside down on the surface tension of the water, where they are carried along by the winds and ocean currents. Glaucus atlanticus is camouflaged: 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 silvery surface of the sea.

Glaucus atlanticus feeds on other pelagic creatures, including the venomous cnidarian, the Portuguese man o' war. This sea slug stores stinging nematocysts from the cnidarian within its own tissues as defense against predation. Humans handling the slug may receive a very painful and potentially dangerous sting.

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