Although the Sea of Cortez is perhaps most famous for its cetaceans, visitors to La Paz frequently find themselves delighted by the California sea lion.

Nestled between mainland Mexico and Baja California, the Sea of Cortez is a very special place. It is home to a third of the planet’s marine mammals, a fact that helps explain why Jacques Cousteau once referred to the region as the “aquarium of the world.” As the capital of southern Baja California, the city of La Paz acts as a gateway to this incredibly biodiverse body of water, where common sights include orcas, blue whales, dolphins and immense shoals of leaping mobula rays. Although the Sea of Cortez is perhaps most famous for its cetaceans, visitors to La Paz frequently find themselves delighted by the California sea lion. These animals are both graceful and playful, and visitors to La Paz can meet them by the hundreds if they visit the rocky outcrops of Los Islotes, a pair of islets located approximately 75 minutes by boat from the city itself. There, ochre rocks striped white with guano are home to melon-headed sea lion bulls, who spend their days posturing and preening for the females; the bark of petulant males challenging another announces your arrival at the island long before you drop anchor. The lower sections of the islands are indiscernible beneath a carpet of sea lions basking in various states of repose, piled on top of one another with no apparent regard for personal space. The azure waters are alive with pups playing in the swell.

It is possible to interact with the Los Islotes sea lions either on scuba or snorkel, and with shallow depths of only 25 to 50 feet (8 to 15m), both methods offer a similar experience. Entering a body of water teeming with boisterous sea lions can be a little daunting, but once you take the plunge, you’ll find that the transformative silence of the underwater world turns the frenetic activity of sea lions into beauty rather than chaos. Instead of feeling intimidated, you’ll find yourself enchanted, as it becomes increasingly obvious that all the sea lion pups really want is for you to play with them. Their agility as they spin and dart around you will put even the fittest of human swimmers to shame. The juvenile sea lions have definite personalities; some of them are shy, regarding you from a safe distance; the rest are irrepressibly naughty. The latter like to play chicken — swimming fast towards you, only veering away at the very last moment, blowing bubbles through their long whiskers as they circle around for the next high-speed fly-by. Their eyes are impossibly large in their puppy-like faces, and the bubbles catch in their fur like tiny droplets of liquid mercury. All around, dense shoals of silver sardines refract splinters of light as they split, divide and regroup around the darting forms of hunting sea lions. The water teems with life, and where diving is usually a spectator sport, the Lost Islotes sea lions give you the leading role in their playful circus.

Although the sea lions are most certainly Los Islotes’ main attraction, the underwater landscape itself is also quite beautiful. One of the islets forms a natural arch, and those on scuba can explore its shadowed recesses, covered in stunning golden cup corals. Brightly colored king angelfish are commonly seen, while seahorses, vividly scarlet Sally Lightfoot crabs and many other fascinating smaller species provide a worthwhile supporting act to the sea lions’ headline show. Above the water, Los Islotes is a bird-watcher’s paradise, providing a safe haven for pelicans, boobies and red-chested frigate birds. The journey to and from the islets is an excellent opportunity to keep an eye out for other marine life, too; often, super pods of bottlenose dolphin escort the tour boat on its way, and the misted column of a whale’s blow in the distance could mean anything from humpbacks to sperm whales. In the Sea of Cortez, everything is possible, and the magic of a day spent with the sea lions often lasts long after Los Islotes has faded into the distance. The best season for whales in the Sea of Cortez is between the months of October and March, so this is a good time to plan your sea lion trip if you’d like the chance of incidental cetacean sightings.

Sea lions are present at Los Islotes throughout the year, with different seasons offering the opportunity to see the colony at different points in their annual cycle. Summertime is pupping season on the islets; early autumn is breeding season and the time of year when you must give obstreperous bulls the widest berth; late autumn finds the adult sea lions focused on building up their fat reserves for the winter ahead. Generally, it’s only the juveniles that take an interest in visiting snorkelers and scuba divers. For safety’s sake, it is advisable not to go too close to the rocks themselves, in order to avoid incurring the wrath of the jealously territorial (and significantly more intimidating) bulls. This is no hardship, however, because at Los Islotes you needn’t approach the sea lion pups — their curiosity and playfulness will bring them to you. Some of the braver pups will even get a little too close, nibbling on your fins if they feel they’re not getting quite enough attention, and yet swimming with them is nevertheless a safe and hugely enjoyable way to interact closely with these beautiful animals. The water at Los Islotes can be relatively cool, with average temperatures of around 68F (20C), so wear appropriate exposure protection in order to maximize your time in the water.

Have something to add to this post? Share it in the comments.
New stuff
Ray Mutilation

Locals Take a Stand over Ray Mutilation and Slaughter

Local divers and ocean lovers in Melbourne, Australia have started a campaign in Port Phillip Bay to put a stop to illegal ray mutilation and slaughter.
by Guest Author
Best Diving in New Caledonia

Best Diving in New Caledonia

Tiny New Caledonia, in the South Pacific between Brisbane, Australia and Fiji, is a diver’s paradise. Here’s a peek at the best diving in New Caledonia.
by Kathryn Curzon
frogfish

Marine Species: Frogfish

A diver and photographer favorite, frogfish have a reputation of being hard to find. What’s the best way to spot one of these distinctive fish on a dive?
by Hélène Reynaud
Dive Safety Equipment

Top Five Pieces of Dive Safety Equipment

These top five pieces of dive safety equipment can help make your dives more comfortable, stress-free and, potentially, save the day.
by Marcus Knight