To dream of fish hooks represents an idea or concept that is being used to lure someone else. Seeing what happens if you try something. Attempting to drum up interest. Alternatively, it may reflect someone else that is trying to get you hooked in an idea.
Negatively, a fishhook may reflect manipulative testing or experimenting. Seeing how far you can take something. Seeing how lucky you can get with some bad intention you have. Selfishly exploiting something to discover what people really think of you.
To dream of a fish caught on a fishhook may reflect feelings about being having discovered new ideas or new insights. Feelings about a test or experiment going well. Learning new things about yourself.
Example: A woman had recurring dreams of a fish caught on a fishhook. In waking life she had been discussing her nightmares about her dead husband to a psychologist and didn’t like the insights she was getting about her dreams. The fish caught on a fishhook in this case may have reflected her use of her previous dreams to get other people interested in discovering what her problems might be and not liking the final results of it.