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Whale Photo-Identification Project

Destino Magazine article for February 2017

by Marilia Olio, Marine Biologist and guide at Cabo Trek

2017_02_Dest Mag Article for February 2017 webHumpback whales are identified as individuals by the underside of their flukes, or tails. The distinct coloration, shape, and scarring pattern of the flukes’ underside are as unique as a human fingerprint, allowing scientists to distinguish individuals using the pictures they have taken of their flukes.

This season, CaboTrek started a photo-identification project in Cabo San Lucas. Our catalogue has more than 250 individual whales. To improve larger existing fluke identification catalogs from the entire West Coast of North America, we share our pictures with Ted Cheeseman from Happywhale, which is a program that tracks individual whales throughout the world’s oceans and with Katherina Audley from the Whales of Guerrero Research Project, which is a project that is studying humpback whales for the first time in Zihuatanejo, in the state of Guerrero, Mexico.

As a part of your experience on our boat, you will learn how to identify whales as individuals. We give each whale we spot an ID – CTHW (for Cabo Trek Humpback Whale) along with their respective number.  Some of those whales are known to us and have a nickname in addition to their ID number.

In the first 3 weeks of our 2017 season, we have already had 17 matches of humpbacks sighted in Cabo San Lucas which were seen in different areas in USA and Canada. Some of the whales already resighted are:

  • CTHW#35 – This was our first match. It was sighted in August 2015 in Moss Landing, California and in December 2015 in Cabo San Lucas, Mexico.
  • CTHW#84 – This whale, also known as Galaxy, has been sighted 11 times in Monterey Bay and Moss Landing, California, from 2009 to 2016 and, in February 2016 in Cabo San Lucas, Mexico.
  • CTHW#160 – This is a well-known whale. It was sighted for the first time in July 2004 in Port San Luis, re-sighted in Santa Barbara Channel, Monterey Bay and Gulf of the Farallones. CTHW#160 was our first whale sighted in Cabo San Lucas this season.
  • CTHW#243 – This whale is also known as Simba. It was named by one of our youngest guest on the trip of 4 January 2017 here in Cabo San Lucas, Mexico. It was seen for the first time in Monterey Bay in 2003, re-sighted 5 more times in Ventura and Moss Landing, California.
humpback whale CTHW#84 Galaxyhumpback whale flucke CTHW#35whale watching cabo CTHW#160

It is our intention to raise awareness regarding best whale watching practices and to contribute to understanding of the dynamics of the Northeastern Pacific humpback whale population in order to improve the conservation plan for humpback whales and the ocean.  As a Cabo Trek guest you are helping with our research project. Book your trip today!


Cabo Trek focus is on educational tours in Baja California Sur region, please check out our other activities:

Philipp Moser

whale watching cabo

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