This comparatively rare word for a fisherman is related to that for a fishing net (gamma 457, gamma 458) and appears to refer to fishing by the cast of a net.
[1] From an epigram by the sixth-century Julian the Egyptian (Greek Anthology 6.28), which ends (7-8), "The fisherman Baiton, arriving at trembling old age, dedicates to you, Eriounios, these gifts." This epithet for Hermes, translated "very useful" in antiquity, seems to refer to Hermes' role as an underworld god, guiding the dead (see epsilon 2998), and is thus appropriate to describe the god to whom a doddering old man dedicates a gift. See further extracts from this epigram at alpha 2652, epsilon 265, iota 336, and iota 755.
[2] Greek Anthology 6.223.5-6, (generally ascribed to Antipater of Sidon), Hermonax dedicates a scolopendra (cf. sigma 646 and alpha 1732) that he found on the beach while net fishing; see also at epsilon 3049. Also see Gow and Page (vol. I, 28); (vol. II, 74-75); and further extracts from this epigram at omicron 521, pi 1426, and xi 15. For the meaning of bo/los see LSJ s.v. (web address 1), citing Theocritus, Idylls 1.40. The more likely meaning here is that Hermonax has a net already full of fish; as a gesture of his gratitude towards the sea gods, he dedicates the scolopendra to them. On another Hermonax, a boy stung to death while attempting to collect honey from a beehive, see also Greek Anthology 9.302 (this by Antipater of Thessalonica).