Documenting these sightings is extremely complicated, since vaquitas are shy creatures that avoid boats.

The vaquita is the world’s smallest cetacean as well as being the most critically endangered species. In 2013, the International Committee for the Recovery of the Vaquita estimated that fewer than 100 vaquitas remained and issued a last call to prevent their extinction.

In early 2014, the Secretariat of Environment and Natural Resources (SEMARNAT) and the National Commission of Aquaculture and Fisheries (CONAPESCA), together with fishing communities in the Upper Gulf, designed a program to meet the objective of conserving the vaquita and the totoaba.

The program conducted a study to estimate the vaquita population more accurately. The new study has been called #ExpeditionVaquita2015. So far, the study has reported sightings of 25 vaquitas, which has encouraged both scientists and the authorities.