BIOTIC Species Information for Dysidea fragilis
Researched bySean Lindsley-Leake Data supplied byMarLIN
Refereed byThis information is not refereed
Scientific nameDysidea fragilis Common nameA sponge
MCS CodeC1667 Recent Synonyms

PhylumPorifera Subphylum
Superclass ClassDemospongiae
Subclass OrderDictyoceratida
Suborder FamilyDysideidea
GenusDysidea Speciesfragilis

Additional Information
Taxonomy References
General Biology
Growth formCrustose soft
Feeding methodActive suspension feeder
Mobility/MovementPermanent attachment
Environmental positionEpilithic
Typical food typesFine suspended organic matter. HabitAttached
Bioturbator FlexibilityLow (10-45 degrees)
FragilityFragile SizeMedium(11-20 cm)
Height15cm Growth Rate
Adult dispersal potential DependencyIndependent
General Biology Additional InformationIt may be thinly encrusting or cushion to massive lobose in form. It is usually less than 15 cm across but can be greater than this in tidal, rocky estuaries.
Biology References
Distribution and Habitat
Distribution in Britain & IrelandThis species is widely distributed around the coasts of Britain and Ireland but rare on the north east coast of Scotland.
Global distributionFound from north-west Europe to the Mediterranean.
Biogeographic rangeTemperate. Depth rangeInsufficient information
Distribution Additional Information

Substratum preferencesBedrock
Large to very large boulders
Physiographic preferences
Biological zoneLower Littoral Fringe
Upper Eulittoral
Mid Eulittoral
Lower Eulittoral
Sublittoral Fringe
Upper Infralittoral
Lower Infralittoral
Upper Circalittoral
Lower Circalittoral
Wave exposure
Tidal stream strength/Water flow Salinity
Habitat Preferences Additional Information
Distribution References
Reproduction/Life History
Reproductive typeBudding
Permanent hermaphrodite
Developmental mechanismLecithotrophic
Reproductive SeasonJune to August Reproductive LocationWater column
Reproductive frequencyAnnual episodic Regeneration potential Yes
Life spanInsufficient information Age at reproductive maturityInsufficient information
Generation timeInsufficient information FecundityInsufficient information
Egg/propagule sizeInsufficient information Fertilization typeInternal
Larval/Juvenile dispersal potentialInsufficient information Larval settlement periodInsufficient information
Duration of larval stageInsufficient information   
Reproduction Preferences Additional InformationThe sperm of sponges are frequently 'broadcast' into the water column. A sponge creates and concentrates the sperm, before expelling it from the excurrent (oscula) pores. The masses of sperms thus released are sometimes so dense that the sponge appears to be smoking. The sperm are then carried by the water current towards another sponge. There, they are captured by the female cells, the choanocytes. Inside the female, the sperm are transported to eggs by special cells. Fertilization occurs, and the resulting [zygotes] [fertilised eggs] develop into [ciliated] larvae.
Reproduction References
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