Dive: I always love the i-bVII-bIII movement for water tracks. So pretty. Full atmosphere.
Seafloor: Serene. Love the progression.
Abyss: Darker tone while still feeling gentle like the rest of the OST.
Fish Festival: Great perc! Love how it builds up.
Trinket: Very gentle end to the OST. Love the chord choices for the resolution.
Great fit to the theme, great work!