Panopea or Panope (Ancient Greek: Πανόπεια / Πανόπη) is one of the fifty Nereids, marine-nymph daughters of Nereus and the Oceanid Doris. Hesiod names her in the Theogony catalogue; Homer places her among the sisters who gather when Thetis mourns Achilles' grief for Patroclus. Handbooks gloss her as the Nereid of the sea panorama — a catalogue presence with little independent adventure.
Adapted from Wikipedia, "Panopea" · CC BY-SA 4.0
I.Among the Nereids
Hesiod lists Panopea among the daughters of Nereus and Doris in the Theogony. Apollodorus and Hyginus likewise count her (or the closely spelled Panope) among the fifty sea-sisters.
Later poets sometimes distinguish a second 'virgin' Nereid form (Panopea / Panopaea) who helps Aeneas in a storm; modern handbooks often treat the names as the same catalogue Nereid doubled across traditions. The atlas keeps this entry as the Hesiodic sea-nymph.
II.In the Iliad
When Thetis cries out in sympathy for Achilles after the death of Patroclus, Homer gathers the Nereids in the bright cave. Panope appears in that mourning throng with Doto, Galatea, and other sisters — a catalogue presence without a separate personal myth.
III.Homonyms
This atlas entry (panopea) is the Nereid. Wikipedia also records a Thespian princess Panope, daughter of Thespius, who bore Heracles a son Threpsippas — a mortal namesake, not the Hesiodic sea-nymph.