This elementary school teaching unit was developed as a part of a series of teaching units that deal with Lake Erie. This unit was developed to enable children to: (1) name the different parts of a fish; (2) assemble a fish using overlapping overheads to reinforce fish parts; (3) build a fish to scale using jumbo fish puzzle parts; (4) classify fish according to various characteristics; (5) name ways animals protect themselves; (6) be familiar with vocabulary words associated with fish; and (7) name different types of fish. The document contains a unit outline, background information for the teacher, reproducible worksheets, overhead transparency masters, card games, puzzles, identification cards, book and song lists, art activities, and a bingo game. The last 12 pages are designed to be removed, laminated, and put together into 4 posters. (TW)