Blue Glaucus (Blue Dragon)
⚡ Key Facts & Quick Answers (AEO Summary)
- Taxonomic Class: Invertebrates & Insects
- Dietary Niche: Carnivore (Portuguese man-o'-war, venomous hydrozoans)
- Max Speed: 1 km/h (0.6 mph)
- Adult Weight: 3 - 5 grams
- Typical Lifespan: 1 year
- Primary Habitat: Open ocean pelagic surface waters (floating)
- Native Region: Global temperate and tropical oceans
- IUCN Red List: Least Concern
📊 Physical & Biological Metrics
🧬 Scientific Taxonomy & Biological Classification
| Kingdom | Animalia |
|---|---|
| Phylum | Mollusca |
| Class | Gastropoda |
| Order | Nudibranchia |
| Family | Glaucidae |
| Genus | Glaucus |
| Species Binomial | Glaucus atlanticus |
📖 1. Species Overview
The Blue Glaucus, or 'Blue Dragon', is a small, venomous sea slug. Floating upside down on the ocean surface, they eat highly venomous siphonophores and store the prey's stinging cells in their own bodies to defend against predators.
🦿 2. Physical Appearance, Anatomy & Adaptations
Vibrant blue and silver patterning, flat body with finger-like branch clusters (cerata), and a gas-filled stomach sac.
🗺️ 3. Habitat, Geographic Distribution & Territorial Range
Float upside down on the surface tension of the water, carried passively by ocean currents and winds.
🥩 4. Diet, Feeding Strategy & Hunting Tactics
Feed on Portuguese man-o'-war, swallowing their venomous stinging nematocysts whole without harm.
🐣 5. Reproduction, Lifecycle & Social Hierarchy
Hermaphrodites. Both individuals release egg strings after mating, which float in open water.
🛡️ 6. Conservation Status, Population Threats & Protection
Least Concern. Widespread in tropical oceans, though vulnerable to microplastics.
💡 Fascinating Facts & Trivia
- They float upside down to use countershading: their blue bellies blend with the ocean, while their silver backs blend with the sky.
- They store the stingers of the Portuguese man-o'-war in their own 'finger' tips, making their touch highly painful.
❓ Frequently Asked Questions (FAQ)
Direct authoritative answers regarding the biology, feeding habits, and habitat of the Blue Glaucus (Blue Dragon).
The Blue Glaucus (Blue Dragon) is scientifically classified as Glaucus atlanticus. It belongs to the genus Glaucus within the family Glaucidae, class Gastropoda, and phylum Mollusca.
In the wild, Blue Glaucus (Blue Dragon)s inhabit Open ocean pelagic surface waters (floating). Their native geographic range primarily spans Global temperate and tropical oceans.
The Blue Glaucus (Blue Dragon) is classified as a Carnivore. It feeds primarily on specialized nutrients suited to its ecological niche in Open ocean pelagic surface waters (floating).
A Blue Glaucus (Blue Dragon) can achieve top speeds of 1 km/h (0.6 mph) and weighs approximately 3 - 5 grams. Its expected natural lifespan is 1 year.
The Blue Glaucus (Blue Dragon) (Glaucus atlanticus) is currently designated as Least Concern on the IUCN Red List of Threatened Species.
Cite this Article
FaunaWiki Zoological Database (2026). "Blue Glaucus (Blue Dragon) (Glaucus atlanticus) Species Profile."
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Fish & Marine Life
Great White Shark
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