Holothuriidae is a family

Family (biology)

In biological classification, family is* a taxonomic rank. Other well-known ranks are life, domain, kingdom, phylum, class, order, genus, and species, with family fitting between order and genus. As for the other well-known ranks, there is the option of an immediately lower rank, indicated by the...

 of sea cucumbers, a type of echinoderm

Echinoderm

Echinoderms are a phylum of marine animals. Echinoderms are found at every ocean depth, from the intertidal zone to the abyssal zone....

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Description

Members of the Holothuriidae family have thick fleshy bodies and several rows of tube feet

Tube feet

Tube feet are the many small tubular projections found most famously on the oral face of a sea star's arms, but are characteristic of the water vascular system of the echinoderm phylum which also includes sea urchins, sand dollars and sea cucumbers and many other sea creatures.Tube feet function in...

 which are used for moving around and for adhering to the surface. The body is often covered with blunt projections known as papillae. Many of them are able to eject a mass of fine sticky threads to distract predators

Predation

In ecology, predation describes a biological interaction where a predator feeds on its prey . Predators may or may not kill their prey prior to feeding on them, but the act of predation always results in the death of its prey and the eventual absorption of the prey's tissue through consumption...

 or even turn their viscera inside out.

Genera

• Actinopyga
  Actinopyga
  Actinopyga is a genus of sea cucumber found in tropical and temperate regions coastal waters.-Species:*Actinopyga agassizi *Actinopyga albonigra *Actinopyga bacilla...
  
  Bronn, 1860
• Ananus
• Argiodia
• Bohadschia Jaeger, 1833
• Gastrothuria Perrier, 1899
• Holothuria
  Holothuria
  Holothuria is a genus of marine animals of Holothuroidea, found in tropical and temperate regions coastal waters. They are soft bodied, armless invertebrates that dwell on the ocean floor, the form resembles a cucumber....
  
  Linnaeus, 1767
• Holothurnia
• Irenothuria
• Labidodemas Selenka, 1867
• Pearsonothuria Levin in Levin, Kalinin & Stonik, 1984
• Sporadipus