Ceratosoma trilobatum laying a bright red egg ribbon on black sand in Lembeh Strait, Indonesia.
Ceratosoma trilobatum Laying Its Egg Ribbon in Lembeh Strait

The Tri-lobed Ceratosoma, or Ribbon Nudibranch, is a visually captivating marine species found in the Indo-Pacific. This salmon-pink slug exhibits unique egg-laying behavior, depositing a coiled ribbon while moving across the substrate. Filming these behaviors in Lembeh Strait requires patience, as natural movement is essential to capture these rare moments. Continue reading Ceratosoma trilobatum Laying Its Egg Ribbon in Lembeh Strait

Pilsbry's Headshield Slug (Tubulophilinopsis pilsbryi) crawling across sandy muck in Lembeh Strait, Indonesia — a black and white sea slug often mistaken for a nudibranch.

Pilsbry’s Headshield Slug: The Black & White Sea Slug That’s Not a Nudibranch

The Pilsbry’s Headshield Slug, Tubulophilinopsis pilsbryi, is often misidentified as a nudibranch but belongs to the Cephalaspidea order. This carnivorous sea slug uses its broad head shield to hunt prey in sandy sediments. Found in the Indo-Pacific, it’s distinguished by its variable black and white coloration, making sightings rare and exciting. Continue reading Pilsbry’s Headshield Slug: The Black & White Sea Slug That’s Not a Nudibranch