Polybius henslowii

Scientific name Polybius henslowii
Descriptor Leach
Year of description 1820
IUCN category NE
Family Polybiidae
Genus Polybius
Polybius henslowii Polybius henslowii


Polybius henslowii is a little salt water crustacea.

Who is it?


  • Average size
    4 cm
  • Maximum size
    4.4 cm
  • Average size
    4 cm
  • Maximum size
    4.4 cm

How to recognize Polybius henslowii ?

Polybius henslowii measures between 4 and 4.4 cm. Given its small size, this species is commonly referred to as a "dwarf" animal. this crustacea is tricolore with a predominantly rouge, bleu and marron body.

Behaviour & Life cycle

  • Sociability
  • territorial
  • Venomous
  • Way of living

Like all crustaceans, Polybius henslowii molts whenever it becomes cramped in its shell. Before the hardening of its new body, it is more vulnerable and spends a good part of its time hidden. This mechanism, very complex, allows the periodic renewal of the exoskeleton and part of the internal skeleton. It is also during the moult that the females become fertile.

Polybius henslowii is a crustacea gregarious. This species is carnivorous . Measuring only a few centimeters, this small species tends to be discreet and hide in the presence of larger neighbors.

Although Polybius henslowii is non-territorial, it is sometimes aggressive towards other species.


  • Reproduction

Polybius henslowii is a crustacea ovipare.

Harmless species

This species does not represent any particular threats to humans when encountered in its natural environment.

Where to find it?

What is its habitat?

Natural environment characteristics

  • Temperature
    7 - 12 °C
  • Depth
    0 - 500 m

Biotope presentation

Polybius henslowii is most often found at a depth between 0m and 500m. However, it is not impossible to find this species at other depths.

This species lives in decaying vegetation (branches, leaves) in low current areas.

Species of the same biotope

To go further

To read on the web

Sources & Contributions

Participation & Validation

The Fishipedia team and specialist contributors are committed to providing high-quality content. However, although the information comes from scientific sources or testimonials from specialists, the cards may contain inaccuracies.

Aurélien Calas

Aurélien Calas

Adrien Falzon

Adrien Falzon


Translation done with the valuable contribution of our translators, who make this information available to a wider audience. We sincerely thank them for their commitment.

Bibliographic references

Unknown facts of the biology of Polybius henslowii – Effect of gender on claw morphology and diet - Catarina Vinagre - Rui Cereja - Ana Silva - Elsevier Ltd - 2020. vol. 165

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Species of the same biotope

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