BIOTIC Species Information for Hyas spp.
Researched bySean Lindsley-Leake Data supplied byMarLIN
Refereed byThis information is not refereed
Scientific nameHyas spp. Common nameA spider crab
MCS CodeS1517 Recent Synonyms

PhylumCrustacea Subphylum
Superclass ClassEumalacostraca
SubclassEucarida OrderDecapoda
SuborderPleocyemata FamilyMajidae
GenusHyas Species

Additional Information
Taxonomy References
General Biology
Growth form Feeding method
Environmental position
Typical food types HabitFree living
Bioturbator FlexibilityNone (< 10 degrees)
FragilityFragile SizeSmall-medium(3-10cm)
Height Growth Rate
Adult dispersal potential DependencyIndependent
General Biology Additional Information
Biology References Hartnoll & Bryant, 2001, Quijan & Snelgrove, 2005,
Distribution and Habitat
Distribution in Britain & Ireland
Global distribution
Biogeographic range Depth range
Distribution Additional Information

Substratum preferences Physiographic preferences
Biological zone Wave exposure
Tidal stream strength/Water flow Salinity
Habitat Preferences Additional Information
Distribution References Quijan & Snelgrove, 2005,
Reproduction/Life History
Reproductive typeGonochoristic
Developmental mechanismPlanktotrophic
Reproductive SeasonAugust to September Reproductive LocationAs adult
Reproductive frequencyAnnual episodic Regeneration potential No
Life spanInsufficient information Age at reproductive maturity1 year
Generation time1-2 years Fecundity1500
Egg/propagule size560 µm Fertilization typeInternal
Larval/Juvenile dispersal potential1km-10km Larval settlement periodMay to June
Duration of larval stage1-6 months   
Reproduction Preferences Additional InformationLarval metamorphosis is dependant on the water temperature but on average takes 85 days at ambient sea temperature.
Reproduction References Hartnoll & Bryant, 2001, Anger, 1983, Petersen, 1995, Quijan & Snelgrove, 2005, Bryant, & Hartnoll, 1995, Thorson, 1946,
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