Flabellinidae

Common Names

Flabellinids are commonly referred to as flabellinids or aeolids. The term aeolids is often used more broadly to encompass all nudibranchs with cerata, but flabellinids specifically refers to members of the family Flabellinidae.

Characteristics

Flabellinids are characterized by the following features:

• Cerata: Flabellinids possess numerous cerata, which are finger-like projections on their dorsal surface. These cerata are filled with digestive gland extensions and are used for both respiration and defense.
• Bright Colors: Flabellinids are known for their vibrant and often striking colors. These colors can serve as a warning to potential predators and may also play a role in camouflage.
• Rhinophores: Flabellinids have two rhinophores, sensory organs located on the head that are used for smell and taste.
• Oral Tentacles: They also have two oral tentacles located near the mouth, which are used for sensing food.
• Small Size: Most flabellinids are relatively small, typically reaching lengths of a few centimeters.

Environment

Flabellinids are found in a variety of marine environments, including:

• Intertidal Zones: They can be found in rocky intertidal zones, often hidden among algae and seaweed.
• Subtidal Regions: Some species are found in subtidal regions, living on coral reefs or other underwater habitats.
• Temperate and Tropical Waters: Flabellinids are found in both temperate and tropical waters, with different species adapted to various temperature ranges.

References

For further information on Flabellinidae, consult the following reliable sources:

• World Register of Marine Species
• Sea Slug Forum
• Nudibranch.com