| NERITES | Freshwater snails named after a mythological Greek sea deity who was turned into a shellfish by the gods (7) |
| NEREUS | Greek sea deity who fathered the water nymphs |
| MUSCLE | Bodily strength of shellfish, by the sound of it (6) |
| MUREX | Genus of predatory sea snails named by Aristotle |
| CRONUS | Saturn's name comes from the Roman god of agriculture, who is equated with this Greek deity, who was one of the Titans and the father of Zeus (the Roman god Jupiter). |
| TRITON | Moon of Neptune named after a Greek sea deity (6) |
| OSIRIS | Egyptian deity who was ruler of the underworld (6) |
| OCEANIDS | Mythological Greek sea nymph daughters of Tethys (8) |
| ORION | Containing an asterism formed by the three stars Alnitak, Alnilam and Mintaka, a constellation named after a mythological Greek hunter (5) |
| ENDYMION | Poem by John Keats named after a mythological Greek shepherd loved by the moon goddess Selene (8) |
| ORIONSBELT | A group of three bright stars in a constellation named after a mythological Greek hunter (6,4) |
| PYGMALION | Named after a mythological Greek sculptor who fell in love with his statue, George Bernard Shaw's play which inspired My Fair Lady (9) |
| TETHYS | Moon of Saturn named after a mythological Greek Titaness (6) |
| ACTAEON | A hunter, in Greek legend, who was turned into a stag by Artemis |
| HALCYON | In Greek mythology, a woman who was turned into a kingfisher; now a word meaning calm and peaceful (7) |
| HYACINTH | Named after a mythological prince accidentally killed by Apollo with a discus, a flower symbolising play/sport, sometimes grown in a forcing vase (8) |
| ARACHNE | Mythological Greek weaver who was turned into a spider by Athene (7) |
| NIOBE | Daughter of Tantalus in Greek mythology who was turned into a stone by Zeus (5) |
| NEPTUNE | Predicted by Urbain Le Verrier using mathematics alone, planet named after a mythological Roman sea god (7) |
| DAPHNE | In mythology, a nymph who was turned into a laurel bush, to save her from Apollo (6) |
