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Marine Habitat Classification

Description of biotope or habitat type

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   Thaumatocrinus jungerseni assemblage on Atlantic mid abyssal mud

Physical habitat description

Salinity Full (30-35 ppt)
Wave exposure
Tidal streams
Substratum Mud - silt or pelagic ooze
Zone Atlantic mid abyssal
Depth Band Biotope depth range 3100 - 4100 m (based on zone); assemblage recorded from 3580 m
Other Features

Download comparative physical and biological data. The comparative tables enable a rapid comparison of the species composition and principal physical characteristics between a given set of biotopes.

Distribution of habitat M.AtMA.Mu.CriCom.ThaJun <i>Thaumatocrinus jungerseni</i> assemblage on Atlantic mid abyssal mud

  • Records used to define the biotope (core records)
  • Other records assigned to this biotope, marked as 'certain'
  • Other records assigned to this biotope, marked as 'uncertain'
  • Predicted extent of the level 3 (for sublittoral rock & deep sea) or 4 (for sublittoral sediment) habitat

Point data based on records in the UK Marine Recorder Snapshot. Predicted habitat extent is from UKSeaMap.


Hughes and Gage (2004) describe this biotope from the mouth of Rockall Trough at 3580m dominated by the comatulid crinoid Thaumatocrinus jungerseni on fine silt or pelagic ooze. It is possible that this site experiences increased current speeds as a result of the constriction of the topography in this area, making it favourable to suspension feeding organisms such as crinoids. This assemblage may therefore be a variation on the Psychropotes longicauda and Oneirophanta mutabilis assemblage. This assemblage was described based on literature only.


No situation data available.

Temporal variation

No temporal variation data available.

Characterising species

Taxon % of core records where taxon was recorded
Thaumatocrinus jungerseni
Fissidentalium candidum
Ophiura ljungmani
Psychropotes longicauda
Oneirophanta mutabilis

Similar biotopes or habitat types

Not applicable or unknown.

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