To dream of shrimp can mean you miss eating this seafood. Shrimp, also known as prawn, is a popular seafood. Perhaps you miss this dish and this triggered the dream.
If you have special memories of shrimp / prawn, you may also dream of this image. Maybe you have a special memory associated with shrimp, like sharing a meal containing shrimp with a special person.
Nostalgia, missing the subject, or input of stimuli linked to the subject, are all possible triggers that activated the memory connected to shrimp.