Drift Dive Through Schools of Tuna and Hammerhead Sharks

By on February 2nd, 2008 in Archive

Almost immediately we were mobbed by an enormous school of yellowfin tuna swimming powerfully all around us, with silky and silvertip sharks thrown in the mix. After they passed, a group of hammerhead sharks made an appearance, allowing some excellent photographing opportunites. As we approached the island, a cloud of triggerfish burst into view, with circling silvertip sharks deep below us. The island drew by quickly in the current, and as we passed to the south we were given one last sendoff by yellowfin tuna and some curious wahoo, with some coy passes by hammerhead sharks for an encore.

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Tuna, Hammerhead and Silvertip Sharks Galore but Where’s the Giant Mantas???

By on February 2nd, 2008 in Archive

There was a coldwater current running past the island steadily for the whole two days, and with it came excellent visibility and a great amount of hammerhead, silky, Galapagos, whitetip, and silvertip sharks.  That’s on top of the friendly wahoo, the massive schools of tuna, the unique photographing opportunity of a moray eel wrapped comfortably around resting whitetip sharks, and big schools of triggerfish, big-eyed trevally, jacks, and other familiar faces.

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New Dive Sites, Blue Water Scuba Diving, Dolphin Diving; a True Expedition

By on January 24th, 2008 in Archive

Finally we went to a new site on the north east side of San Benedicto and found some interesting rock formations with lots of reef life and what appeared to be a moray eel the colour of a Clarion Angelfish. Definitely a place for further investigation. On the run home we came up with a list of possible names for the newly explored sites including Whale Sound, Booby Prize, The Act of Waiting on a Rock and Watching Barnacles although none have been adopted at this time. Maybe a few more dives on the sites will bring out the personality of the sites and the names will become obvious.

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Giant manta ray migratory route

By on February 27th, 2007 in Archive, Captain Mike, Socorro

Highlights included a huge bait ball of skipjacks being hunted by silky sharks and 100-pound yellowfin tuna, a group of five hammerhead sharks that approached within 40 feet of the divers and a blue water drift dive looking for pelagics. All the usual Roca Partida critters were present, including over 30 white tip reef sharks, silky and Galapagos sharks and some curious wahoo.

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Dominance and a large black manta ray

By on February 18th, 2007 in Archive, Captain Mike, Socorro

Interestingly, one group of divers reported observing behaviour that reminded me very much of the great white sharks of Guadalupe Island. Last season we would see 2 white sharks swim side-by-side as if they were measuring their respective lengths against each other. The smaller animal would then peel off into the blue. The larger animal presumably being the dominant animal. I “think” we saw the same thing with 2 giant manta rays. 2 animals (a chevron manta and a larger black manta) swam in tight formation in a vertical pattern. The smaller chevron then peeled off and disappeared into the blue. Presumably, just like the white sharks, the large black manta ray established it’s dominance and got to hang out with a human.

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Red hot diving at Roca Partida

By on February 17th, 2007 in Archive, Captain Mike, Socorro

Measuring 91 metres by 45 metres by 34 metres high, the island is actually the lava plug from a volcano that gradually eroded away around it. It is an amazing 11,000 feet deep around the volcano and we gingerly anchor the Nautilus Explorer in 245 feet of water very close to the lava tube. Roca Partida is a “magnet” for mantas, sharks of all kinds, wahoo, tuna, dorado and all other manner of sub-tropical fish.

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Leaping wahoo and tuna at Roca Partida

By on February 7th, 2007 in Archive, Captain Mike, Socorro

We have never seen so many yellowfin tuna in one place. They all seem to be 100 pounds or more, which is a very big tuna! The action got especially hot off the back of the Nautilus Explorer yesterday afternoon as the tuna and wahoo literally exploded out of the water in giant leaps as they chased down their prey. It is quite something to see a 100-pound tuna jump out of the water 200 feet away from the ship.

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