Sponges are deposited on the rocks.

“A broken heart in real life isn't half as dreadful as it is in books. It's a good deal like a bad tooth, though you won't think THAT a very romantic simile. It takes spells of aching and gives you a sleepless night now and then, but between times it lets you enjoy life and dreams and echoes and peanut candy as if there were nothing the matter with it.”
― Lucy Maud Montgomery