APHOTOMARINE

An educational resource dedicated mainly to the photography
and diversity of marine life that can be found in coastal waters
and intertidal areas of Great Britain and Ireland by David Fenwick.

A-P-H-O-T-O Wildlife Stock Image Library
Halisarca dujardinii Johnston, 1842 - A sponge (Sponge / Porifera images)
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Sponge
Halisarca dujardini
- under rock / lowershore 1

Specimen above was found under a rock on the lowershore on an extra low water spring tide at Chimney Rocks, Penzance, Cornwall. 21.03.12.

Sponge
Halisarca dujardini
- on the algae Saw Wrack 1

Sponge
Halisarca dujardini
- on the algae Saw Wrack 2

The specimen above was found on the brown seaweed Fucus serratus, Saw Wrack at Mylor Marina, Mylor Churchtown, Falmouth, Cornwall. 28.10.10.

Comparing Halisarca
on algae and stone.

PLEASE NOTE - When found on Fucus serratus and Ascophyllum nodosum a different species may be involved as the similar Halisarca metschnikovi, which can occur on both these species of algae at the mouths of estuaries (Lévi). Halisarca dujardini and Halisarca metschnikovi can only be distinguished by minute details of gametogenesis and larval development, so not visually.

Picton, B.E., Morrow, C.C. & van Soest, R.W.B., 2011. [In] Sponges of Britain and Ireland

Halisarca dujardini Sponge Porifera Images
The main objective of this website is in furthering environmental awareness and education through the medium of photography. To increase awareness and access to the wildlife of the region and help
people find and identify it. Sometimes the difference between species is obvious but many species can only be determined by observing microscopic characteristics that are specific to any one species.