AND, ANIMAL, ANIMALIA, BADACZE, BADANIA, BADANIE, BIOLOGIA, BIOLOGIST, BIOLOGY, DEAN, DZIEKAN, FISH, II, IN, KRAKEL, LUDZIE, NAUKA, NAUKOWCY, NAUKOWIEC, PEOPLE, PSTRAG, RESEARCH, RESEARCHERS, RESEARCHING, RIVER, RYBA, RYBNA, RYBNE, RYBNY, RZEKA, SCIENCE, SCIENTIFIC, SCIENTIST, SIE, STUDIA, STUDY, STUDYING, TAG, TAGGING, TAGOWANIE, TROUT, UCZENIE, UCZYC, W, WAGA, WAZENIE, WAZYC, WEIGH, WEIGHING, WEIGHT, YELLOWSTONE, ZOOLOGIA, ZOOLOGIST, ZOOLOGY, ZWAZYC, ZWIERZE, ZWIERZECY,