That the area of the in which many water-related (and few land-related) constellations are located is called “The Sea” or “The Water?” And that it is suspected that this clustering of water-themed constellations exists because the sun passed through this part of the sky (at least where Ptolemy was naming constellations) during the rainy season?

Such constellations in “The Sea” include:

• Aquarius (the water-bearer)
• Capricorn (the sea-goat)
• Cetus (the whale)
• Delphinus (the dolphin)
• Eridanus (the river)
• Hydra (the water serpent)
• Pisces (the fishes)

Cool!