Fig. 3
From: Sexual and asexual reproduction in a Mediterranean Tethya (Porifera, Demospongiae) species
Tethya meloni. Histological sections: A, B Clusters of young oocytes, in (A) they surround a canal (ca) of the sponge aquiferous system. C-E oocytes at different maturation stages. F, G spermatic cysts (sc) and spermatocytes (sp) around the canals (ca) of the aquiferous system. Mallory’s trichrome stain. Space bars: A, F = 100 μm; B = 50 μm; C-E, G = 25 μm