PORIFERA : HADROMERIDA : TethyidaeSPONGES

Tethya citrina Sara & Melone, 1965


Tethya citrina

Description: This spherical sponge is typically pale to bright yellow in colour. The surface is tuberculate (warty) and often 'buds' are present, found on short stalks on top of these tubercles. There is one, large compound oscule opposite to the point of attachment. Overall the appearance is like a small orange.

Habitat: A common species in the infralittoral zone, usually on horizontal or gently sloping rocky surfaces in clean water, but can tolerate silt.

Distribution: A common species on western and southern coasts of the British Isles.

Similar Species: Two other species of Tethya, Tethya hibernica and Tethya norvegica are now known from Britain and Ireland. Both are known from very few records. This species may also possibly be confused with Suberites carnosus, however the latter species has a smooth velvety surface. Tetilla cranium and Tetilla zetlandica are the same shape and have a rough surface, but T. zetlandica is bright white and T. cranium has distinctive 'S' shaped microscleres.

Key Identification Features:

Distribution Map from BioMar data for Ireland - Google Earth map:  download this placemark (not got Google Earth installed?)

Distribution Map from NBN: Grid map (fast) : Interactive map (slow, requires login to view records) : National Biodiversity Network mapping facility, data for UK.



 Picton, B.E. & Morrow, C.C., 2010. [In] Encyclopedia of Marine Life of Britain and Ireland
http://www.habitas.org.uk/marinelife/species.asp?item=C2130

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