I noticed this guitarfish in about 20 ft of water as we were swimming back from our dive at Monastery. Brenna had air, so she went down for a closer look, and took a sweet picture.
There were hundreds of them and they let you get within a few feet of them. Too bad the rest of the day was a wreck.
The shovelnose guitarfish, Rhinobatos productus, is a ray that ranges from central California down to the Sea of Cortez. This species has had one documented case of an attack on a diver when a male guitarfish was interrupted during mating. Due to the tooth structure of the guitarfish, this attack could have resulted in a "gumming" at worst.