Whale goes Poof - Street poster Art around North Hollywood

These posters have been around my neighborhood since the beginning of the year. I don't see any name.
They look like interesting, and fun characters.

On second thought, this whale looks like he's in distress. I also noticed a big, cartoony poster of Swiss cheese on a signal box on the corner. Someone took the time and resources to put these up around the area.

This was near the corner of Camarillo and Cahuenga. Does anyone know who made these?