This worksheet corresponds with my PowerPoint covering Cnidarians. The PowerPoint is presented with a fill-in-the-blank format. Students can guess the answered before revealed with a click. They fill in the words on this note taking guide. The PowerPoint looks at the four major groups of cnidarians: hydrozoans, jellyfish, sea anemones, and coral. It gives interesting information about each of these groups and some stunning photographs. Included are some video suggestions. Terms included are medusas, polyps, nematocysts, symbiotic, and bleaching.