Disarticulated fish microremains from the Middle Givetian to early Frasnian of the Holy Cross Mts include representatives of the most groups known from the Devonian: placoderrns. elasrnobranchs, holocephalians, acanthodtans, osteichthyans (mostly osteolepidids) and actinopterygians. Taxonomic identifications are possible usually only in very general terms and only in two cases the generic level has been reached: Phoebodus among euselachians, and Moythomasia among paleoniscids. Many of these groups, regarded traditionally as typical dwellers of lacustrine to resticted marine nearshore biotopes, apparently flourished also in the offshore. open shelf carbonate (pert-reef) settings. The sequential replacement of the fish faunas was primarily influenced by eustatic events, in like manner to
invertebrate communities.

Key words: ichthyoliths, paleoecology, Devonian, Poland.