Pompilus (Greek, Ancient (to 1453);: Πομπίλος|Pompilos|pilot fish) is a minor character in Greek mythology who incurred the wrath of the god Apollo when he foiled the god's plans as he was chasing the nymph Ocyrhoe.
During a festival in honour of Artemis in the city of Miletus, in western Asia Minor, the god Apollo became infatuated with Ocyrhoe, a young Samian nymph, daughter of a local river god in Samos. Apollo chased Ocyrhoe, but she ran away from him. Finally she reached the shore and there she ran into Pompilus, a seafarer and old family friend of her father Imbrasos. Pompilus agreed to let her board his boat, and transferred her to the nearby island of Samos. But as they reached the coast of Samos, they found Apollo waiting for them in there. Apollo grabbed Ocyrhoe and turned Pompilus into a pilot fish as a punishment for trying to sabotage his plans.[1] [2] Both authors who mention this tale, Athenaeus and Claudius Aelianus, quote second century BC author Apollonius of Rhodes.