Beach: What other creatures have you seen?

The beach is beautiful but it is also scary sometimes especially if you go to the deeper part of it. Because, there are a lot of deep sea creatures that we do not know about and we don't know what harm they can do to us.

But on the other side of the coin, seeing these creatures like the starfishes, the seashells, just makes you wonder that the sea is just like what it is in the land. There can be creatures that are meant to harm us but there are also more creatures that are meant to bring happiness to us. :)

What other creatures have you seen on the sea/beach? :)