Common name: Thuridilla gracilis

General information

Thuridilla gracilis, commonly known as the Leaf Slug or Sapsucking Slug, is a species of sacoglossan sea slug, a shell-less marine opisthobranch gastropod mollusk. These slugs are known for their vibrant colors and intricate patterns, which make them a visually appealing addition to the reef aquarium. They are small, typically reaching up to 5 cm in length, and are characterized by their elongated, leaf-like bodies.

Care

Caring for Thuridilla gracilis requires a well-established aquarium with a stable environment. They are specialized feeders, primarily consuming algae, and it's crucial to ensure that their dietary needs are met. They are sensitive to water quality, so regular water changes and monitoring of water parameters are essential. Due to their small size and specific feeding habits, they are best suited for mature reef tanks where microalgae are present.

Reproduction

Thuridilla gracilis are hermaphrodites, possessing both male and female reproductive organs. They can reproduce through a process called hypodermic insemination, where one slug will inject sperm into the tissue of another. The eggs are laid in gelatinous strings and hatch into free-swimming larvae, which will eventually settle and metamorphose into juvenile slugs.

Habitat

Thuridilla gracilis is found in tropical and subtropical seas, often in shallow waters on or near coral reefs. They prefer environments where there is an abundance of their preferred food source, algae. In the wild, they are typically found at depths ranging from the intertidal zone to several meters below the surface.