Data of mesozooplankton are collecting continuously at least twice a year in the northeastern Black Sea from 1994 to present time. Currently, only data until 2005 will be made available.

An annotation is given for the species Cerianthus vogti Danielssen, 1890, the only ceriantharian species occurring deeper than 2000 m in the seas bordering Europe.

An annotated check-list is given of Echinoidea species occurring deeper than 2000 m in the seas bordering Europe.

An annotated check-list is given of Antipatharia species occurring deeper than 2000 m in the seas bordering Europe.

An annotation is given for the species <i>Rokopella brummeri</i> (Goud et Gittenberger, 1993), the only monoplacophoran species occurring deeper than 2000 m in the seas bordering Europe. The species is known only from the type locality in the northeast Atlantic.

An annotated check-list is given of Asteroidea species occurring deeper than 2000 m in the seas bordering Europe.

An annotated check-list is given of Brachiopoda species occurring deeper than 2000 m in the seas bordering Europe.

An annotated check-list is given of Xenophyophores species occurring deeper than 2000 m in the seas bordering Europe.

An annotated check-list is given of Porifera species occurring deeper than 2000 m in the seas bordering Europe.