1. Trophic ecology of benthic marine invertebrates with bi-phasic life cycles: what are we still missing? / Ricardo Calado and Miguel Costa Leal --; 2. Body size versus depth: regional and taxonomical variation in deep-sea meio- and macrofaunal organisms / Jesse M.A. van der Grient and Alex D. Rogers --; 3. The pen shell, pinna nobilis: a review of pooulation status and recommended research priorities in the Mediterranean Sea / Lorena Basso, Maite Vázquez-Luis, José R. García-March, Salud Deudero, Elvir Alvarez, Nardo Vicente, Carlos M. Duarte, and Iris E. Hendriks.