Lina Brun 
A little fish on the seabed [EPUB ebook] 
with audio

The little fish Mario takes a stroll across the seabed and meets all his friends: a starfish, seahorses, jellyfish, a hermit crab, many anemones. Eventually he will even run into a child with a mask, which will scare him and make him run away. This is a nice way to get to know the sea, having fun with games and a coloring page.