And every Sea Elf subsequently drowns the first time they go to sleep where they ostensibly live, because their water breathing spell expires or a cabal of evil sahuagin sorcerers quietly drop anti-magic shells over their homes.Water Breathing can be rewritten as a cantrip.
If necessary, Water Breathing can be rewritten as a slot-1 spell.
In any case, Water Breathing is subpar for slot 3.
Darkvision is a slot-2 spell. Albeit it too can be rewritten as a cantrip instead.
Then a player who wants an Elf who has darkvision and breathes water can PICK THOSE SPELLS.