Giant Mantas of San Benedicto Island

The focus of our trip was to photograph the giant mantas (Manta birostris) at San Benedicto Island in the Revillagigedo Archipelago. These are the largest mantas in the world and can be more than 20 feet (6 meters) across and weigh up to 3,500 pounds (1600 kilograms). The dive site called “the Boiler” is a cleaning station for these mantas where fish remove parasites from their bodies. Consequently, this site provides the best opportunities to see and photograph these gentle giants.

Giant manta with two remoras attached. San Benedicto Island, Mexico.

The Revillagigedo Archipelago lies approximately 390 kilometers (240 miles) off the coast of Cabo San Lucas in Mexico. These Pacific islands are more commonly referred to as the Socorro Islands. Aboard the Southern Sport, we dove 3 of the 4 islands (Roca Partida, San Benedicto, and Socorro).

“The Boiler” has the best encounters in the Revillagigedo Archipelago, Mexico.

A color variant from the more common black and white manta is an all black or nearly all black manta. It is not a different species of Manta birostris. However, it is exciting when one showed up as it looks so different.

The “black manta” is a color variant of the Manta birostris. Pacific ocean, Mexico.
Both color variants are shown here. San Benedicto Island, Mexico.

San Benedicto is the island for the giant mantas. They are used to divers and show no fear of people. They swim It seems a bit surreal, even a few weeks after our encounter with them, to have had huge mantas swim within a few meters of us. 

What do they think of us when we look into each other’s eyes? “The Boiler”, Mexico.
Pair of mantas (Manta birostris) at San Benedicto island, Pacific ocean, Mexico.
“The Boiler” at San Benedicto Island, in the Revillagigedo Archipelago, Mexico.



Whitetip Reef Sharks: Socorro Islands

The Revillagigedo Archipelago lies approximately 390 kilometers (240 miles) off the coast of Cabo San Lucas in Mexico. These Pacific islands are more commonly referred to as the Socorro islands. Aboard the Southern Sport, we dove 3 of the 4 islands (Roca Partida, San Benedicto, and Socorro). The whitetip reef shark (Triaenodon obesus) is common here.

Whitetip Reef Shark Swimming At El Canyon Dive Site At San Benedicto Island
Male Whitetip Reef Shark. The Reproductive Claspers Are On The Bottom

The whitetip reef shark rarely exceeds 1.6 meters (5 feet). It is nocturnal and rests during the day under ledges and caves.  At Roca Partida, we observed many groups of whitetip reef sharks congregating in groups of 3 to 15 on the ledges. By approaching them slowly we were able to capture this behavior.

Group Of Five Whitetip Reef Sharks On Ledge At Roca Partida


Group Photos Are Possible By Approaching These Sharks Slowly


These sharks hunt at night and eat mainly crustaceans like crabs, lobsters, and shrimp as well as bony fishes. They tend to hunt in groups. During the day, it was interesting to observe many large lobsters out in the open just a few feet away from the whitetip reef sharks. Apparently, the lobsters know that they are safe from these sharks during the day.

If Disturbed Whitetip Reef Sharks Swim A Short Distance And Return To Their Ledge.
Pregnant Female Cruising Over The Volcanic Island Known As Roca Partida.


Grey Whales In Magdelena Bay, Baja California Sur, Mexico.

The blue whales in the Sea of Cortez (see the previous post) was a neat experience but the grey whale encounters on the Pacific side of the Baja Penisula were breathtaking. Often female grey whales with calves will come up alongside the boat and occasionally let you touch and rub them. This is the experience we had. Grey whales can reach 15 metres (50 feet), weigh about 35 tonnes (75,000 pounds) and live approximately 60 years.


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This Grey Whale Calf, About 2-3 Weeks Old, Stays Very Close To Its Mother In The Bay At Adolfo Lopez Mateos, Mexico.
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Playful Grey Whale Calves Often Come Next To The Boats At Magdelena Bay, Mexico.
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Each Day The Mother Grey Whale Exercises Her Calf To Build Up Its Strength For The Long Journey North In Just A Few Months. Baja California Sur, Mexico.

Each winter the whales migrate from Canada and Alaska south to The Baja Peninsula traveling up to 11,000 kilometres. There are a number of bays and lagoons along the Pacific (western side) where the pregnant mothers deliver their babies. At birth, the calves are about 4 meters (13 feet) long and weigh approximately 800 kg (1,764 pounds)! The babies are often playful and occasionally bring their heads out of the water making interesting photographs.

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This Grey Whale Calf is Only 2-3 Weeks Old And Is Curious At Adolfo Lopez Mateos.
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The Mothers Allow The Calves To Come Next To The Boats. Baja California Sur.
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Grey Whale Calf Leaning On Mom. Notice The Blowhole & Barnacles. Magdelena Bay.
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Not Sure How Well A Grey Whale Calf Can See Above Water. Adolfo Lopez Mateos.
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What Is This Grey Whale Calf Thinking As It Looks At Us? Magdelena Bay, Mexico.

We were hoping to get some good underwater shots with our underwater cameras to get a different perspective of them as most people see then only from the surface. The water, however, is very green filled with phytoplankton and visibility was maybe 10 feet. Therefore, it proved difficult to get any good photographs but we have included a few to give a different perspective.

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Mother Grey Whale Lifting Calf To Surface, Baja California Sur, Mexico
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Playful Grey Whale Calf Next To Its Enormous Mother At Adolfo Lopez Mateos, Mexico


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Grey Whale Calf Approaching Our Boat At Magdelena Bay, Mexico

If someone is wanting a wonderful whale experience for themselves or for their family then we would highly recommend the grey whales at the fishing town of Adolfo Lopez Mateos, Magdelena Bay, Baja California Sur, Mexico. We were there towards the end of February.

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Occasionally, The Tail Will Break The Surface As The Grey Whale Begins Its Descent.
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Another Grey Whale Beginning Its Descent In Magdelena Bay, Mexico
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After Descending The Adult Grey Whale Can Remain Submerged For 10-15 Minutes But The Calves Must Surface More Often. Magdelena Bay, Mexico.
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Barnacles Growing On the Skin Of A Grey Whale. Magdelena Bay, Mexico.
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The Blowhole On The Top Is How The Grey Whale Breathes. Baja California Sur.


Blue Whales In The Sea Of Cortez, Baja California Sur, Mexico

Blue whales (Balaenoptera musculus) are the largest whales in the world reaching lengths approaching 30 metres (100 feet) and weighs up to 180 tonnes (400,000 pounds). They start arriving in the Loreto Bay National Marine Park, Mexico in February each year. There seems to be a sweet spot called the blue triangle where they are regularly seen. Danzante Island, Del Carmen Island and Monserrate Island make up this blue triangle in the Sea of Cortez. Some whales like humpbacks with their spectacular breaches, or grey whales that come next to your boat are more photogenic. However, blue whales just break the surface of the water to exhale, take in more air and descend.

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Blue Whale In Loreto Bay National Marine Park, Sea Of Cortez, Mexico
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Upon Surfacing The Blue Whale Exhales Air From Its Blowhole Creating A Large Waterspout

On our way to our dive site, we saw some large waterspouts caused by the exhaling blue whales off in the distance so a detour was in order. Marine park rules dictate that you keep your boat a specific distance away from the whales. The way it works is that you see the blue whale in the distance, you move the boat towards them but by then they have descended again. The boat captain guesses where he thinks they will come back up (usually 6-9 minutes later) hoping they will surface closer to the boat. We played this game about 8 times and each time they came up a long distance from the boat. Great experience but now it was time to go to our dive site so off we went. Unexpectedly, the whale surfaced about 30-40 metres (100-130 feet) away from the boat which was close enough to get these photographs!

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Blue Whale Blowhole Close-up Just After Exhaling, Sea of Cortez, Mexico
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Blue Whale Beginning Its Decent After Taking In More Air, Loreto Bay National Marine Park
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Descending Blue Whale Showing Small Dorsal Fin, Sea Of Cortez, Mexico


Horn Sharks And Rays: Our First Dive In The Sea Of Cortez A Success!

The purpose of our dive was to photograph Horn sharks and we got lucky on our second dive around Danzante Island in the Loreto Bay National Marine Park, Sea of Cortez, Mexico. Thank you to Juan Carlos Reyes Valerio our dive master for finding these rather reclusive sharks. Although we found 3 different horn sharks, 2 were deep in crevices and they were impossible to photograph. However, it only takes one and this shark was out in the open apparently waiting to be photographed. Horn sharks are not strong swimmers and this shark is trying to tuck as close to the rocks as possible.

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Horn Shark

This area has more than sharks and we saw 3 different species of ray, two that stayed still long enough for us to photograph. The ocellated electric ray or bullseye electric ray (Diplobatis ommata) can generate a moderate electric charge for self-defence. The bullseye or ocellus on the back is very distinctive and is where it derives its name. It is a small ray reaching about 10 inches (25cm) in length.

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Bullseye Electric Ray/Ocellated Electric Ray
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Bullseye Electric Ray/Ocellated Electric Ray

The second ray we were able to photograph was the spotted round ray also known as the Cortez round ray (Urobatis maculatus). They have short tails compared to many other rays and reach a length of about 17 inches (45cm). This ray didn’t stick around for very long before it headed to deeper water.

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Spotted Round Ray/Cortez Round Ray
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Spotted Round Ray/Cortez Round Ray

A surprise for us to come across was the banded guitarfish (Zapteryx exasperata). We were not aware that there were a guitarfish species in the Sea of Cortez. This fish can reach up to 4 feet (1.25m) and has both dorsal fins of nearly identical size. Unfortunately, it had its head facing away from us partly going into a crevice.

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Banded Guitarfish



Hummingbirds In Baja California Sur, Mexico

Every day we walk the arid canyons and hills around Danzante Bay along the Sea of Cortez. The sparse vegetation has many cacti and some flowering shrubs. Surprisingly, we see hummingbirds out here on a regular basis which we did not expect.

Moon over Mountain

At Villa Del Palmar where we are staying, they have flowering plants that attract the hummingbirds on a regular basis. There are two species that we have identified. The Xantus’ and the Costa’s hummingbirds.

Costa’s Hummingbird
Xantus’ Hummingbird

Hummingbirds proved difficult to photograph as they don’t stay still for very long. To get closeup shots we shot at 600mm with our 150-600mm lens. With such a narrow field of view, it takes time to find the hummingbirds. After you find it the next step is to focus on the bird but most of the time the hummingbird has decided to move to the next flower. They zip around from flower to flower in a very irregular pattern.

Costa’s Hummingbird


Xantus’ Hummingbird

The key to getting these photos was patience and taking lots of photos (most of them were discarded). Hopefully, you will enjoy these beautiful little birds.Hummingbird7

Xantus’ Hummingbird
Costa’s Hummingbird
Xantus’ Hummingbird
Costa’s Hummingbird

Whale Sharks in Isla Mujeres

Our trip to Isla Mujeres, Mexico to swim with whale sharks was all we hoped it would be.  The visibility here is better than some other locations as whale sharks come to Isla Mujeres to feed on Bonito (tuna) eggs which are clear, unlike other areas in the world where they feed on plankton.

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Although we were focussed on whale sharks it is not uncommon to find manta rays in the same areas. On our 3rd & 4th day we had fewer encounters with the whale sharks but found areas where there were also manta and mobula rays. We had some great encounters with these rays!

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One of the photography techniques we would like to perfect is Over-Under such as this one.  Over-Under photos are tricky as you need to take into account the lighting and focus of both below and above the water line.Whale Shark over under (1)-2

Whale Shark Facts:

  • they are called the Gentle Giants for a good reason as they can grow to over 40′ in length & weigh up to 21.5 tons (47,000 lb)
  • they are filter feeders and feed mostly on plankton, copepods, krill, fish eggs as well as small crabs & fish
  • their life expectancy is 70 to 100 years
  • they reach sexual maturity at 30 years and give birth to live young
  • they prefer to stay near the surface but can dive down to 5000′
  • they have no natural predators and humans are their only threat to survival
  • their mouths can grow to over 4.5′ wide
  • they filter an average of 1,500 gallons of water every hour
  • they are highly migratory but swim very slowly