Oceanbound

This datapack creates an ocean world where survival is difficult. In early game, finding a shipwreck for wood and killing tropical fish for food is key. It is possible to find a village on a beach, but they are really rare.

Changes to world generation:
Most of the world is warm ocean and deep warm ocean. Other possible biomes are lukewarm ocean, ocean, cold ocean, frozen ocean, beach, snowy beach, swamp, and stone shore. These other biomes are rare and small if you find them.

Biome changes -- grass on beach biomes can spawn passive mobs, also pillager outposts on beaches, and villages on beaches, snowy beaches, and frozen ocean biomes.