The whale numbers give plenty of opportunities for the researchers to get close to the animals - but often not close enough to get a good breathsample.
In Texas, if you get a second offense DWI you have to install and maintain a deep lung air device on the car that requires a breathsample before it will allow you to start your car.
During the same campaign last year, a total of 4, 145 drivers were breathalysed and 119 (2.9%) people tested positive or failed to provide a sample of breath.
"We are now collaborating with colleagues to sample patients in order to demonstrate the strengths, as well as limitations, of breath analysis more comprehensively, " she said.