Octans

Octans (Fishing) is a dim constellation added by Astral Sorcery. It is associated with water and fishing.

Stellar Refraction Table
This constellation bestows mcw:Enchanting on helmets and Water Breathing on potions.

Ritual
This constellation makes it easier to fish in Water blocks near the Pedestal.

Mantle of Stars
The Mantle provides the player with infinite Water Breathing.