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  • Destinations
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Tag: galapagos sharks

Variable diving conditions

  • Post author By Nautilus Staff
  • Post date 2007-03-21
By Nautilus Staff on March 21st, 2007 in Archive, Socorro

It’s the last dive day of this trip and everyone is sad that it’s going to be over shortly. The diving conditions at the Canyon and the Boiler dive sites at San Benedicto Island can be highly variable and Captain Dave reports that the diving has been quieter than usual over the last couple of weeks. It’s still “very good” with large biomasses of fish, silvertip, Galapagos, silky and hammerhead sharks and, of course, our friendly giant manta rays.

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  • Tags el canyon, galapagos sharks, Giant Mantas, hammerhead sharks, manta rays, Mantas, silky sharks, silvertip sharks, The Boiler

World class diving at Roca Partida with sharks and mantas

  • Post author By Nautilus Staff
  • Post date 2007-03-19
By Nautilus Staff on March 19th, 2007 in Archive, Socorro

Just to top things off, four giant manta rays came into to the rock and spent “quality time” with our divers, gliding by close enough to touch. Interestingly, there were very few silky sharks, and divemasters Sten, Tricia and A.J. speculate that the silkies may have been intimidated by all the other sharks. Diving the Revillagigedos (Socorro Island) is not always hot but man, when it’s on, it is RED HOT DIVING!!

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  • Tags dolphins, galapagos sharks, giant manta rays, hammerhead sharks, humpback whales, Mantas, Roca Partida, schooling galapagos sharks, silky sharks, silvertip sharks, yellowfin tuna

Tail lobs and competitive humpback whale behaviour

  • Post author By Nautilus Staff
  • Post date 2007-03-17
By Nautilus Staff on March 17th, 2007 in Archive, Socorro

A group of guests also went out in a skiff to get a closer look at four adult humpback whales and one juvenile and were rewarded with 15 minutes of dramatic tail lobs (smacking their tails on the ocean surface). While tail lobs can be a “back off” message directed at humans, or a “let’s get together guys and stay close,” it seemed much more likely that there was some male to male competitive behaviour going on here. ‘Tis the season at Socorro Island for humpback whales to mate and breed!!

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  • Tags el canyon, galapagos sharks, giant manta rays, humpback whales, jacks, lobster, silvertip sharks, The Boiler

Giant manta ray migratory route

  • Post author By Nautilus Staff
  • Post date 2007-02-27
By Nautilus Staff 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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  • Tags bait ball, clarion island, dr. bob rubin, galapagos sharks, giant manta rays, hammerhead sharks, manta science, Roca Partida, San Benedicto, Sea of Cortez, silky sharks, skipjacks, Wahoo, white tip reef sharks, yellowfin tuna

Interesting bottlenose dolphin behaviour at Socorro Island

  • Post author By Nautilus Staff
  • Post date 2007-02-25
By Nautilus Staff on February 25th, 2007 in Archive, Socorro

Divers saw the usual complement of electric rays, Socorro lobster, silky, Galapagos and hammerhead sharks, but their most spectacular encounter was with a single bottlenose dolphin who adopted the divers. We’ve been seeing similar behaviour from the dolphins all winter, where they hang out and literally imitate the divers. If a diver hangs on to the ascent line, the dolphin will rest the underside of his head on the line. If a diver blows bubbles, the dolphins will blow bubbles. If a diver does a 360-degree roll, the dolphin will do a full roll (well actually, they tend to be somewhat playful and will often do a 720-degree roll or even a triple barrel roll).

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  • Tags bottlenose dolphin, dolphin behaviour, dolphins, electric rays, galapagos sharks, hammerhead sharks, humpback whales, lobster, Punta Tosca, sharks, silky sharks

Spawing surgeonfish at Cabo Pearce

  • Post author By Nautilus Staff
  • Post date 2007-02-16
By Nautilus Staff on February 16th, 2007 in Archive, Captain Mike, Socorro

Visibility was variable at the outer cleaning station, but we had good sightings of 4 different mantas, schools of tuna, a couple of inquisitive Galapagos and silky sharks, and small schools of scalloped hammerheads as well as 1 possible sighting of a 12 foot long great hammerhead.

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  • Tags freediving, galapagos sharks, great hammerhead, hammerhead sharks, Mantas, pompano, scalloped hammerheads, silky sharks, surgeonfish, triggerfish, tuna tagging

Silky sharks under the ship’s lights

  • Post author By Nautilus Staff
  • Post date 2007-02-09
By Nautilus Staff on February 9th, 2007 in Archive, Captain Mike, Crew, Socorro

Dave reports that the divers saw 7 silver tip sharks between 5 and 7 feet in length circling at the north end of Roca Partida, along with at least 10 silky sharks and some good-sized Galapagos and hammerhead sharks. One interesting note is that one small silvertip shark apparently chased away 4 larger silky sharks (4 – 5 feet in length) that were hanging around a tag line hanging off the back of the Nautilus Explorer. Not sure on the dominance behaviour of silky and silvertip sharks, but that strikes me as highly irregular behaviour.

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  • Tags galapagos sharks, hammerheads, night snorkel, silky sharks, silvertip shark

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