Tag Archives: scuba diving

Ostracods Sexy Dance

Leave a reply

Ostracods in Bonaire – a sexy dance while diving.  A few days after the full moon an astounding phenomena happens underwater in Bonaire that is akin to an underwater firework display by tiny creatures called Ostracods!

Our friends on Ad Astra had been talking about this amazing display for weeks and so after the full moon they decided to plan another day out on their big boat, Ad Astra.  Our friends from Element joined us for a total of 10 people (7 divers).  We headed over to Klein Bonaire to a site called Sharon’s Serenity.  The plan was to dive the site during day light hours, then go back and do a second dive at night to try to witness the mating of the Ostracods.

The first dive was pretty amazing.  Matt and I headed out first and explored 23 meters below the surface to find a wide array of sea life.  We saw a small school of Hawaiian Black Triggerfish also called Black Durgon which are actually dark blue with a tad bit of green if you get up close and personal (which they wouldn’t let us).  The white strip is actually silver, but it appears to glow as they swim by.

Image courtesy of Google Images. Not our own

As we were waiting for the other divers, we explored a huge coral that had a large cave or protected area (perfect for lion fish and/or lobsters) so I peered in and to my surprise there were 4 HUGE lion fish – probably 15-18″ in length hovering upside down!  I was so darn impressed and in awe of these stunning creatures that I almost forgot they are destroying the reefs.  I showed Matt and a few of the others the find and eventually swam back to the boat.  Matt and I had a good long dive, over 60 minutes at this site.

We got back on Ad Astra and enjoyed some light snacks and shared stories of what we saw below.  Just after sunset, we put our gear on again and jumped back in the water.  Since the current had picked up a bit, we decided to head to the bow of the boat toward the mooring.  A few of us were armed with flash lights so as we waited for full darkness as we explored the shallows and found several eels and lots of fire worms which are pretty spectacular at night but hurt immensely if you touch them.

Source: http://bit.ly/1rnwnD7 Photographer: Phillipe Guillaume

We had a strong current and in an effort to minimize our movement and use less air, we decided to hold on to the mooring line to wait for the Ostracod show to begin.  We had already turned off our lamps and were truly just hanging out in 6.5 meters of water in the darkness.  We did have the moonlight and once your eyes adjusted you could see so it wasn’t total blackness.

The Ostracods (or Seed Shrimp), are tiny creatures (only a few millimeters long) live in shallow water for mating.  They belong to the Crustacea family (shrimp, lobsters, and crabs) and produce a blue glow to attract a partner.

There are many creatures that can glow, especially marine life at greater depths.  This phenomena is called bioluminescence. The glow is produced to attract a partner for mating or for signaling alarm to others. Other sea life that glow underwater are (specific types of) octopus, jellyfish, worms, plankton and deep sea fish.

Cypridinid ostracods are one of the type of Ostracods that can be found around Bonaire, the ones that produce the magnificent bioluminescence show around full moon. On land male fireflies attract mates by producing light patterns with bioluminescence, the same goes for Cypridinid ostracods underwater.

The magical mating show happens two to five days after the full moon. The glow and glitter explosion will take place 45 minutes after the sun has set and before the moon fully rises – and if and only if the Ostracods have NOT been disturbed by any light (dive torch, street light, lights from buildings, etc).

While we were waiting for the Ostracods to start mating we experienced a pretty cool display of bioluminescence ourselves.  We started to wave and clap our hands underwater and were gifted with a dramatic display of something that looks like green fairy dust from Tinkerbell. This came from much smaller (microscopic) animals, a type of plankton, called Dinoflagellates. Dinoflagellates are found around the whole world and mostly seen around the new moon phase.

After the Dinoflagellates showed up,  we slowly saw more and more tiny dots lighting up in the reef, for just a split second. After a few more minutes the dots became strings. The single Ostracods were swimming in a vertical line towards the surface while flashing and signaling the females. The line of bioluminescence was about 50 cm long sometimes and stayed visible for a few seconds. Nature can be just astounding!  The closer we got to the soft coral, the more we saw, surrounding us – it was truly magical and a bit romantic.  Maybe because Matt was holding my hand, but also because we knew we were enjoying a once in a lifetime experience.

We did not bring the GoPro down as we don’t have the proper equipment to shoot at night below the water, but thanks to Google you can find plenty of images online (see below).  Famed photographer Elliot Lowndes who filmef this National Geographic documentary, you can see a different species lighting up the nighttime Caribbean.  This is ont the same species who were in Bonaire, but it gives you an idea of what it is like during this mating ritual.  Check out this video, especially :30-:53 for highlights

Image courtesy of “Sail Away – a travel blog by Curly”

Image courtesy of Scientific American Blog

Above the water, you get a beautiful show as well – we did NOT see anything this spectacular, but we did see vibrant green ostracods floating on the surface of the sea.

Scuba Duba Do

3 Replies

Many of you know that Matt is a very experienced diver.  He has completed many night and cave dives well before he met me.  For our honeymoon, 12 years ago, we had decided to charter a catamaran (as this was prior to owning Sugar Shack) in the Virgin Islands and Matt wanted to dive the Wreck of the Rhone.  So, it was time for me to get my diving certification.  My best friend and I took classes at Tom’s Dive Shop in Austin and did our first open water dive in Lake Travis which, at the time, was cloudy, murky, and cold.  You could not see your hand in front of your face which was challenging to do your pre-dive safety skills.  But we all passed and Matt and I enjoyed the beauty of the dive on our honeymoon.

We have not had many opportunities to dive since then, but Matt was determined to get back in the deep water.  So, in Curacao, we purchased two dive packages including tanks, BC’s, regulators, and weights.  We had been doing a lot of research on the islands (between Bonaire and Curacao) and found a pretty “decent” deal (after we negotiated a discount for buying two packages) from Scuba and More.  They had a good selection of dive equipment, multiple packages to select from, and very helpful staff.  The manager, Ruud even provided us with a lift back to the dinghy dock as we had walked to his store and there was no way we could carry all this gear back ourselves.

Matt’s small BC on the tank & my XS BC on the left. (funny they think I’m an XS!)

We purchased Mares dive equipment, as the old Dacor that Matt used to use is no longer in business.  Ruud and Tanya walked us through everything and there are a couple of new nifty things that I want to share with you.

The regulator:

  • Has a bubble defecting side exhaust which expels bubbles to the left of your face (not from the bottom center) which minimizes bubble interference
  • Has a large pivoting purge button.
  • Mass centralization to reduce jaw fatigue and is super light

Both the octopus have the same configuration.

WHISTLE

    • There is no external hanging whistle.  They made one of their clasps a whistle.

Whistle at the chest clasp. Super convenient with no extra piece.

POCKETS AND WEIGHTS

  • There seems to be a pocket for everything.  The octopus for your friends can either be clipped on or stowed in pocket (sticking out for easy access) to get it out of your way.
  • The gauge has a pocket to stow its cable and it peaks out at the bottom of the BC for easy access, but out of your way.
  • The weights (which I need 4 lbs on each side) can either go in the side pockets or in the back pockets and have a super nice locking system indicating locked and unlocked

Rear pockets for weights or treasures.

Front pocket weight holders with easy locking detection system.

Since, the water was icky in Curacao where we were anchored, we decide to wait to test all our gear in Bonaire.  Matt was very patient with me and walked me through setting up the new gear, exploring the new pockets, attachments, and placement of everything.

Ready to go into the water.

The bow of the boat is in pretty shallow water about 3-3.5 meters and stern is about 4-5 meters before the ledge which drops to about 50 meters). So we decided to do a giant stride off the sugar scoops.  Matt helped me first as I was really unsteady with the flippers and tank, but off I went.  My previous issue with diving was hearing myself breath like darth vader!  You’d think I’d be happy hearing myself breath, but no – it bothered me.  However, with the new regulator it did not seem to bother me nearly as much.  I did have mask problems which Matt fixed as best as he could in the water, and managed to perform the standard dive skills with the exception of removing / flooding my mask.  Since we “jimmied” the mask strap it was hard for me to take it on and off so we tried to clear the mask by flooding it and for some reason I had issues.  We practiced that a bit until I got more comfortable before hitting the deep water.

We then swam around the boat and admired the beautiful coral farm growing behind and under the boat.  We burned through 1000 PSI and called it a day – until next time.

Little fishy in training.

With all the gear out and the boat in pretty shallow water, Matt decided to do a HUGE zinc replacement project. Our port engine was in dire need of love.  The large zinc and the 3 smaller zincs needed to be replaced (even though they were just replaced in December).  It took Matt several hours to remove the screws, bolts, nuts, blades, and hub all under water.  He managed to remove everything without losing anything!

We would normally not let the zincs get this bad, but we had not been in a clear shallow spot for awhile which made it hard to change it all out.

New large zinc and old zinc.

Then it took him several more hours to clean it all up, remove the barnacles, growth, short hair and make it shiny again.

Clean hub and blades.

Do you remember the hairy version of these blades?

With everything all cleaned up, he put it back together on the boat, put it in order of assembly and headed back under water.  It was a good day with light wind and seas, little current, and clear, shallow water.  My amazing husband managed to completely replace all zincs and put the prop back in working in order in less than 30 minutes.   There is an Invest storm coming our way so we wanted to be ready to evacuate Bonaire for safer waters if need be.