Sponge Guide

UNCW National Science Foundation Valdosta State University Universidad Nacional de Colombia

Observed Characteristics:


  • pink-lilac


  • encrusting


  • crumbly
  • soft

Sample Locations:

  • Bahamas

Xestospongia deweerdtae “associated”

Notes: Thin lavender-pink, crumbly crusts found living over sponges of the genus Plakortis [Plakortis deweerdtaephila in the Bahamas, also pictured here, and Plakortis symbiotica (not included here); see Vicente et al. (2016)]. Oscules of these Plakortis are free of Xestospongia deweerdtae tissue; there are also numerous holes on the surface that may serve as inhalant areas for the lower sponge, and there are tissue filaments of the upper sponge that enter the lower sponge, perhaps to aid in gas or nutrient circulation (Vicente et al., 2014). Spicules are strongyles 170-260 x 2.5-6.3 µm, arranged in an unispicular isotropic reticulation; these spicules are smaller than the “free-living” morphotype of X. deweerdtae, pictured here separately to avoid confusion, apparently from the advantage brought about by the association (Vicente et al., 2014; 2016). It should be compared to Haliclona strongylophora Lehnert & van Soest, 1996 (not included here).

Author Reference: Lehnert & van Soest, 1999


Link: World Porifera Database