Found 18 Seaside CC0 textures in library

Aerial Beach 01
Aerial Beach 02
Aerial Beach 03
Aerial Sand
Coast Land Rocks 01
Coast Sand 01
Coast Sand 02
Coast Sand 03
Coast Sand 04
Coast Sand 05
Coast Sand Rocks 02
Coral Fort Wall 01
Coral Fort Wall 02
Palm Tree Bark
Park Dirt
Rock 3
Shell Floor 01
Wood Planks Grey