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Desidae or Intertidal Spider Facts, Identification, & Pictures

Desidae Spiders

The Desidae family is known for inhabiting in the water. The members of the family use silk threads to secure the object they live in. This creates an air bubble which they use during the high tide. The big family has around 330 species and 60 genera.

Desidae Spiders

Spiders Belonging to this Family


Physical Description and Identification


Size: Female spiders are typically larger with a size of around 0.35 in (0.88 cm), and males are slightly smaller sizing 0.23 in (0.58 cm).

Color: The color depends on each species, but mostly they have a red to brown appearance, with white hairs.

Other Characteristic Features: The abdomen is large, and they have slender eggs.


It is believed that the spider lay eggs in a sac, like so many other members of the family.


The appearance and activities of the spiderlings are yet to be observed and examined.

The Web

Some species of the family make water-proof and thick webs.

Are Desidae Spiders Venomous

It is not known whether they are a threat to humans or not.

Quick Facts

Other NamesIntertidal
DistributionAustralasia and South America and Malaysia
HabitatBarnacle shells, around corals and plants
Web-typeWaterproof webs
LifespanNot known

Did You Know

  • The species, Desis bobmarleyi of the Desidae is named after Bob Marley, because of its habitat, resonating the theme of his song “High Tide or Low Tide”.
  • Desis bobmarleyi is listed as one of the 20 magnificent species in the World Register of Marine Species, in 2018.
  • The name of the family is given after one of its genus Desis, whose members live in the water, precisely in between tides.