Synallactidae

Synallactidae is a family of marine invertebrates belonging to the class Holothuroidea, commonly known as sea cucumbers. These echinoderms are found in various marine environments worldwide, typically inhabiting the seafloor. Members of the Synallactidae family are characterized by their elongated, cylindrical bodies and their unique feeding apparatus. They are deposit feeders, meaning they consume sediment and extract organic matter from it using specialized tube feet modified into a crown of tentacles surrounding their mouth.

The family encompasses several genera, each with distinct morphological features. Their body walls are often leathery and can vary in color, ranging from brown and grey to more vibrant hues. Synallactids play a significant role in benthic ecosystems by bioturbating sediments, which helps to oxygenate the seafloor and recycle nutrients. Their distribution is wide, with species found in both shallow coastal waters and the deep sea. Reproduction in Synallactidae, like other sea cucumbers, generally involves external fertilization, with sexes being separate. The larvae develop through planktonic stages before settling to the bottom and metamorphosing into juvenile sea cucumbers. Research on Synallactidae contributes to our understanding of deep-sea biodiversity and the ecological functions of these fascinating marine organisms.