20x Plan Fluor / 40x Plan Fluor. DIC / Phase Contrast. Sampled in Bay of Santander. July, 21th 2017.
“… sponge larvae usually are not observed in plankton samples. They are lecitotrophic and spend their short free life span most often near the bottom.” Larink, O. & Westheide, W. (2011)
This larva (specimen) had many lipid droplets and, therefore, the it remained floating on the surface of the water.
Maldonado & Bergquist (2002)
Ereskovsky, A (2010). Typization of Sponge Development and Its Significance for Phylogeny. Chapter 5. The comparative embryology of sponges. Springer Netherlands.
Larink, O. & Westheide, W. (2011). Coastal plankton. Verlag Dr. Friedrich Pfeil. München. (see p. 52).
Maldonado, M. & Bergquist, P.R. (2002). Phylum Porifera. Chapter 2, Atlas of Marine Invertebrate larvae. Young, C.M., Sewell, M.A., & Rice, M.E. (eds). Academic Press. San Diego, CA.