Scientific Name: Thuridilla sp.01 (NSSI2) 
Common Name: Unidentified thuridilla

Adult Size: 10 – 20 mm
Depth Range: 5 – 20 m
Biotope / Habitat: Coral reef slopes and algae-covered rocky outcrops, typically seen gliding among algae and rubble patches
Diet: Feeds on green algae, using its radula to gently scrape and consume cell contents while incorporating chloroplasts (kleptoplasty)
Reproduction: Hermaphroditic; reciprocal mating occurs, with tiny, coiled egg ribbons laid in algae or protected reef areas
Fun Fact: Thuridilla sp.1 is known for its soft blue-green body with fine white to yellow lines, blending perfectly with the algae and seagrass it calls home — a gentle, solar-powered reef wanderer!

This subtle yet captivating sea slug’s calm hues and phototrophic abilities make it a lovely find for macro photographers and algae-focused reef explorers.