Macro
Spanish Dancer
Hexabranchus sanguineus · Marine gastropod mollusk — family Hexabranchidae; one of the largest nudibranchs known
Most nudibranchs crawl; the Spanish dancer, disturbed, lets go of the reef and swims — mantle skirts flaring and rolling in the deep-red flamenco motion that named it. It ranks among the largest of all nudibranchs, a crimson animal that can reach forearm length, and it is almost strictly nocturnal, which makes it a signature night-dive find across the Indo-Pacific and Red Sea. By torchlight look for one plowing across open reef between sponge meals, often carrying passengers: emperor shrimp ride the mantle folds like deckhands. Its eggs are as recognizable as the animal, a rose-shaped ribbon of pink spirals fixed to hard bottom and chemically defended like the adult. Watch a voluntary swim from a respectful distance; forced performances exhaust an animal with nowhere to hide.
Où et quand en observer un
« Résident » signifie que la plupart des plongées sur ce site permettent de les observer ; « saisonnier » signifie qu'ils sont présents de manière fiable durant les mois indiqués ; tout le reste est un bonus, pas une certitude.
| Destination | Fiabilité | Mois | Notes |
|---|---|---|---|
| Sharm El Sheikh & Ras MohammedEgypt | Occasional | Toute l'année | |
| North & South Malé AtollsMaldives | Occasional | Toute l'année | |
| Marsa Alam & the Deep SouthEgypt | Occasional | Toute l'année | |
| Lembeh StraitIndonesia | Occasional | Toute l'année | |
| Kona, HawaiʻiUnited States | Occasional | Toute l'année |
Meilleur mois, en un coup d'œil
Les comprendre
Habitat: Coral reefs, rubble, and lagoon slopes, sheltering by day and crossing open bottom at night between sponge meals.
Aire de répartition: Tropical Indo-Pacific and Red Sea, east to Hawaii and French Polynesia.
Comportement: Almost strictly nocturnal; crawls like any dorid until disturbed, then swims free with rolling flexes of its flared crimson mantle. Lays a rose-shaped pink egg ribbon on hard bottom.
Régime alimentaire: Sponges, favoring chemically defended species whose compounds it stores for its own protection.
Taille: généralement autour de 0.25 m; documenté jusqu'à 0.6 m (body length; most individuals run 20–30 cm).
Comment se comporter avec lui
If the swimming display happens, enjoy it — but never lift, prod, or fan an animal loose to force a performance, and leave the egg roses unhandled.
Conservation
Not formally assessed; conspicuous size makes it a frequent harassment victim, which responsible operators actively brief against.
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Regarder
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