The cost of the fish is $15. However, this question seems out of context as this is a programming Q&A site, not a marketplace. If you're trying to parse this statement through a program, you could use a regular expression or a string operation to extract the price. For example, in Python you might use: ```python import re text = "The fish is 15 USD" match = re.search(r'\d+', text) if match: print("The fish costs $" + match.group() + " USD") ``` This will extract the numeric value and print the cost of the fish. Keep in mind this is a very basic example and doesn't account for various potential complexities in parsing currency from text.