Por el mar y los océanos
Por todas las aguas
The North Sea, and the Atlantic Ocean.
sea: el mar ocean: el océano
neither sea is just another way to say oceans.
mar
Sea lo que sea.
Maldita sea
Because Canada is surrounded by 3 oceans (Arctic, Atlantic & Pacific). So, by saying "from sea to sea" it means that we are a united country all across.
Seafaring is an adjective that means a person who regularly sails by sea.
Sea lo que sea chica
"No sea perezoso."
Santuario marino
Según sea necesario is the best way to say "take as you need" in Spanish.