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.
在哪里、什么时候能见到
"常驻"表示在该目的地潜水时大多数情况下都能遇见它们；"季节性"表示在所列月份内可靠出现；其他任何情况都是意外惊喜，而非计划中的保障。
| 目的地 | 可靠性 | 月份 | 备注 |
|---|---|---|---|
| AnilaoPhilippines | Resident: seen on most dives | 全年皆宜 | |
| Lembeh StraitIndonesia | Resident: seen on most dives | 全年皆宜 | |
| Dumaguete, Dauin & Apo IslandPhilippines | Resident: seen on most dives | 全年皆宜 | |
| Poor Knights IslandsNew Zealand | Resident: seen on most dives | 全年皆宜 | |
| British ColumbiaCanada | Resident: seen on most dives | 全年皆宜 | |
| Milne BayPapua New Guinea | Resident: seen on most dives | 全年皆宜 |
最佳月份一览
深入了解
栖息地: 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.
分布范围: All oceans, polar to tropical; the Coral Triangle holds the richest shallow-water diversity known.
习性: 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.
食性: Specialists almost to a species: sponges, hydroids, bryozoans, tunicates, anemones, eggs, or other sea slugs.
体型: 通常约 0.03 m; 记录深度可达 0.6 m (order-wide range; most diver-found species are 1–6 cm, while the Spanish dancer reaches about 60 cm).
与它相处时的行为守则
Shoot without touching or relocating: posed slugs on borrowed backgrounds are the macro world's staged wildlife problem. Keep strobe sessions short per animal.
保育
Almost none have been evaluated for the IUCN Red List; their fortunes track the sponges, hydroids, and other prey they depend on.
以此著称的已标注潜点
高亮显示的潜点由编辑团队为该物种标注；数字为1990年以来潜点约5公里范围内的GBIF出现记录数。
观看
来自官方渠道
Wildlife of Monterey | New film in our auditorium
Live Aviary Cam | Monterey Bay Aquarium
Live Aviary Cam | Monterey Bay Aquarium
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