The word "sepiadae" is a scientific classification of cuttlefish. It is spelled s-uh-p-ee-uh-d-ey, with the stress being on the second syllable. The umlaut "¨" over the letter "e" indicates that it is pronounced as a separate vowel sound. The ending "-idae" is a common suffix used in biological classification, indicating a family of organisms. Thus, "sepiadae" refers to a family of cuttlefish. Proper spelling is important in scientific contexts as it ensures clear communication between researchers.
The cuttle-fish tribe.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.