Pestarella tyrrhena (formerly Callianassa tyrrhena) is a species of thalassinidean crustacean (ghost shrimp or mud shrimp) which grows to a length of 70 mm (2.8 in). It lives in burrows in shallow sandy parts of the sea-bed in the Mediterranean Sea and northern Atlantic Ocean. It is the most common thalassinidean in the Mediterranean, and has been used as bait by fishermen for at least 200 years.