Phyllodesmium jakobsenae

Phyllodesmium jakobsenae is a small sea slug that typically reaches a length of up to 30 mm. This nudibranch is characterized by its possession of zooxanthellae, specifically of the genus Symbiodinium, within its digestive gland. Its coloration and morphology can help distinguish it from other similar species, although specific visual identifiers are not detailed in the sources. It inhabits regions such as Bunaken Island in North Sulawesi, Indonesia, and the Philippines, primarily residing in coral reef environments. This species is typically found at depths shallower than 40 meters, with the majority of occurrences recorded at depths less than 20 meters. Phyllodesmium jakobsenae feeds on soft corals, particularly the genus Xenia, which provides it with nutrients necessary for its survival. The ecological interactions of this nudibranch highlight its role in the marine ecosystem, where it contributes to the dynamics of coral reef communities. Encounters with Phyllodesmium jakobsenae during dives can be intriguing, as divers may observe its unique feeding behavior on soft corals. The conservation status of this species is not evaluated in the sources, indicating that more research may be needed to understand its population dynamics and potential threats.