1. Bond C, Harris AK (1988) Locomotion of sponges and its physical mechanism. J Exp Zool 246:271–284
2. Burton M (1949) Observations on littoral sponges, including supposed swarming of larvae, movement and coalescence in mature individuals, longevity and death. Proc Zool Soc Lond 118:893–915
3. Cattaneo Vietti R, Balduzzi A (1988) Relationship between radular morphology and food in the Doridina (Mollusca:Nudibranchia). In: Edmunds M (ed) Evolutionary Biology of Opistobranchs 9th Int Malacological Congr, Edinburgh 1986: 15–23
4. Cicogna F, Pronzato R (1985) A time-lapse photography equipment for investigation of macro zoobenthos activity. Rapp Comm Int Mer Medit 29 (6): 183–184
5. De Vos L, Van de Vyver G (1981) ‘Etude de la contraction spontanée chez 1’ éponge de eau douce Ephydatia fluviatilis cultivée in vitro. Ann Soc R Zool Belg 3:21–31