Old Friends, New Names
The latest edition of Nudibranchs of the Coral Triangle is now available.
This update incorporates numerous taxonomic changes, newly described species, and revised scientific names published since the previous edition. Some familiar nudibranchs now appear under different names, while several recently described species have been added to the guide for the first time.
Several species included in earlier editions as unidentified or provisional taxa have now received formal scientific names. Examples include Thecacera melkyi and Thecacera pikachu.
Now: Nembrotha lorosae
Described and formally named since the previous edition.
Why Nudibranch Identification Keeps Changing
Nudibranch taxonomy is one of the fastest-moving areas of marine biology. Every year, researchers describe new species, revise existing classifications, and publish genetic studies that reshape our understanding of relationships between sea slugs.
For underwater photographers, marine life enthusiasts, citizen scientists, and dive guides, keeping track of these changes can be surprisingly difficult. Names that were considered valid only a few years ago may already be outdated.
This is exactly why Nudibranchs of the Coral Triangle is updated on a regular basis.
Now: Thecacera melkyi
Described and formally named since the previous edition.
Now: Thecacera pickachu
Described and formally named since the previous edition.
New Species Added
In addition to name changes, several species have been added to this edition, including rarely encountered members of the genus Phyllodesmium.
These additions help make the guide more complete and better reflect the species currently encountered throughout the Coral Triangle.
A Continuously Updated Nudibranch Guide
Since its first publication in 2019, Nudibranchs of the Coral Triangle has been updated repeatedly to keep pace with modern taxonomy.
Today it remains the only identification guide dedicated to the nudibranchs and sea slugs of the Coral Triangle that is actively maintained and regularly revised as new scientific information becomes available.
Now: Launsina rupropurpurata
Described and formally named since the previous edition.
Designed for Divers and Underwater Photographers
The guide covers nudibranchs and other sea slugs found throughout:
- Indonesia
- The Philippines
- Malaysia
- Papua New Guinea
Whether you are photographing rare species, logging observations, contributing to citizen science projects, or simply trying to identify a colorful sea slug after a dive, the guide provides a practical reference based on current scientific knowledge.
About the Author
Author and underwater photographer Andrey Ryanskiy spends several months each year diving and photographing marine life throughout Indonesia and the Coral Triangle. The continual stream of new species descriptions and taxonomic revisions makes an up-to-date reference essential even for experienced observers.
If you dive in the Coral Triangle and enjoy searching for nudibranchs, this updated edition belongs in your digital library.
Explore the latest version of Nudibranchs of the Coral Triangle and stay current with the rapidly changing world of sea slug taxonomy.