Macro
Nudibranchs
Nudibranchia · Marine gastropod mollusks, order Nudibranchia; order-level overview of more than 3,000 described species
Nudibranchs are the reason macro divers stop covering distance. More than three thousand described species of these shell-less snails crawl the world's seafloors wearing colors that work as warnings, advertisements, and camouflage all at once, and more are named every year, with muck hotspots regularly producing animals new to science. The order splits broadly in two: dorids, carrying a rosette of gills on the back, many recycling sponge toxins into chemical defense; and aeolids, fringed in tentacle-like cerata that store working stinging cells stolen from the hydroids they eat. Rhinophores, the paired head antennae, smell the water for prey and mates. Most species live weeks to a year, so casts turn over fast and no two months on the same site produce the same list. Slow to a crawl and the sand starts producing.
أين ومتى تراها
"مقيم" تعني أن معظم الغطسات في هذه الوجهة ستُمكّنك من مشاهدتها؛ "موسمي" تعني أنها متواجدة بشكل موثوق خلال الأشهر المذكورة؛ أي شيء آخر فهو مكسب غير متوقع، وليس شيئًا يُعتمد عليه في التخطيط.
| الوجهة | الموثوقية | الأشهر | ملاحظات |
|---|---|---|---|
| AnilaoPhilippines | Resident: seen on most dives | طوال العام | |
| Lembeh StraitIndonesia | Resident: seen on most dives | طوال العام | |
| Dumaguete, Dauin & Apo IslandPhilippines | Resident: seen on most dives | طوال العام | |
| Poor Knights IslandsNew Zealand | Resident: seen on most dives | طوال العام | |
| British ColumbiaCanada | Resident: seen on most dives | طوال العام | |
| Milne BayPapua New Guinea | Resident: seen on most dives | طوال العام |
أفضل شهر، في لمحة
فهمها
الموئل: Every bottom type divers visit (reef, rubble, sand, kelp, jetty piles, mud), wherever each species' prey grows; the order as a whole ranges from tide pools to the deep sea.
النطاق: All oceans, polar to tropical; the Coral Triangle holds the richest shallow-water diversity known.
السلوك: Slow, chemically defended browsers; hermaphrodites that mate side by side and lay coiled egg ribbons. Aeolid species store working stinging cells from the hydroids they eat.
النظام الغذائي: Specialists almost to a species: sponges, hydroids, bryozoans, tunicates, anemones, eggs, or other sea slugs.
الحجم: عادةً حوالي 0.03 m; موثَّق حتى عمق 0.6 m (order-wide range; most diver-found species are 1–6 cm, while the Spanish dancer reaches about 60 cm).
كيف تتصرف في حضوره
Shoot without touching or relocating: posed slugs on borrowed backgrounds are the macro world's staged wildlife problem. Keep strobe sessions short per animal.
الحفاظ على البيئة البحرية
Almost none have been evaluated for the IUCN Red List; their fortunes track the sponges, hydroids, and other prey they depend on.
المواقع المعروفة بها
المواقع المُبرزة رسَّمها محرّرونا لهذا النوع؛ والأرقام هي سجلات ظهور GBIF المُسجَّلة في نطاق نحو 5 كم من الموقع منذ عام 1990.
شاهد
من القنوات الرسمية
Wildlife of Monterey | New film in our auditorium
Live Aviary Cam | Monterey Bay Aquarium
Live Aviary Cam | Monterey Bay Aquarium
مقاطع الفيديو روابط مُضمَّنة لقنوات أصحابها. لا نستضيف شيئًا ونُشير إلى المصدر في كل الأحوال.