Whether they’re angry, irritated or happy some dogs have the kookiest of faces. In his latest series, photographer Seth Casteel captures canine expressions brilliantly, and from a different perspective.

Casteel takes to the pool and using his underwater camera, photographs the looks on the faces of the dogs as they dive into the water after their balls. See his fierce, funny, and utterly adorable photos after the jump.

See more from Casteel’s underwater series on his website gallery.

[via +Jim Sher]