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Mystery Critter

From the Abyss!

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By Andy Lamb

Image courtesy of the Canadian Scientific Submersible Facility and the University of Washington

Ed McNicol has a job that most of us who venture underwater can only dream about – this certainly includes yours truly. Ed is a contractor working as the Video Project Manager for the University of Washington School of Oceanography. In his role, he works with high-definition video from a Remotely Operated Vehicle (ROV). In the summer of 2011, Ed worked with the team from the Canadian Scientific Submersible Facility in Victoria, BC.  There, while aboard the Research Vessel Thompson and deploying the Remotely Operated Platform for Ocean Sciences (ROPOS), he recorded a video clip of an unusual fish (photo#1 is a frame from the video). The exploration event occurred at 45 degrees 55 minutes north and 129 degrees 59 minutes west, well off the outer coast of Vancouver Island. The fish was living at the incredible depth of 1,525m (5,033 ft.)!

An active scuba diver and divemaster, Ed had tentatively identified this creature as a blob sculpin Psychrolutes phrictus. And he was correct. This unusual deepwater denizen was only discovered in 1978. What little is known about it has resulted from submersible observations and deep water trawling activities that have become more common in recent years. This “goliath” of a sculpin grows to 28 in (70cm) and 21 lb. (9.5kg) but has not been found shallower than 1,200 ft (366m).

Even the most adventurous techie diver has no chance for an encounter. The most similar fish that the average diver might see is the tiny tadpole sculpin Psychrolutes paradoxus (page 233, in Coastal Fishes of the Pacific Northwest). By comparison however, the blob sculpin would appear to be “on steroids”. For those of you interested in what Ed and his team are up to, consult www.ooi.washington.edu and www.ropos.com. There are more amazing deep water creatures as well as information on the fascinating technology utilized in the research program that can be accessed at this site.

Andy Lamb's Mystery Critter: Out of Its Depth

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Photo courtesy Betty Bastai

The primary reason divers encounter “new” critters is simply participation. The more one looks the more one sees. It is very simple. However, one of the reasons that veteran “critter” divers encounter a marine organism for the first time is that the particular specimen viewed is noticed at a depth shallower than the species normally resides. The following story Betty Bastai relayed is an excellent example.

An Oak Harbor resident, Betty and her dive buddy Sam Osteen had originally planned a December 10th, 2011 dive for the very popular Whidbey Island locale called Keystone. Encountering major beach grooming activity there, they moved a few miles east to Driftwood Park Beach. This dive site is littered with bottles, tires and other man made debris – features that provide ready habitat for many creatures. Encountering 10 ft visibility, Betty and Sam eventually arrived at a depth of 58 ft., and a small group of brown rockfish huddled with one other Sebastes that was very different. At first Betty though it was a Puget Sound rockfish, but after looking closer, realized it was quite different. The approximately 8 in. (20 cm) long specimen was most approachable and consequently Betty was able to obtain the good quality image presented herein.

After later reviewing the image and noticing that this slender rockfish had a noticeable pale pink stripe along its lateral line, rather large eyes and a definite knob on its protruding lower jaw, Betty correctly identified it as a redstripe rockfish Sebastes proriger (page 180, Coastal Fishes of the Pacific Northwest 2).
Betty’s sighting occurred very shallow for this species which is seldom seen by divers at all. When encountered, the redstripe rockfish is usually lurking below 100 ft (30 m.).

Andy Lamb's Mystery Critter: Out of Its Depth

  • PDF


Photo courtesy Betty Bastai

The primary reason divers encounter “new” critters is simply participation. The more one looks the more one sees. It is very simple. However, one of the reasons that veteran “critter” divers encounter a marine organism for the first time is that the particular specimen viewed is noticed at a depth shallower than the species normally resides. The following story Betty Bastai relayed is an excellent example.

An Oak Harbor resident, Betty and her dive buddy Sam Osteen had originally planned a December 10th, 2011 dive for the very popular Whidbey Island locale called Keystone. Encountering major beach grooming activity there, they moved a few miles east to Driftwood Park Beach. This dive site is littered with bottles, tires and other man made debris – features that provide ready habitat for many creatures. Encountering 10 ft visibility, Betty and Sam eventually arrived at a depth of 58 ft., and a small group of brown rockfish huddled with one other Sebastes that was very different. At first Betty though it was a Puget Sound rockfish, but after looking closer, realized it was quite different. The approximately 8 in. (20 cm) long specimen was most approachable and consequently Betty was able to obtain the good quality image presented herein.

After later reviewing the image and noticing that this slender rockfish had a noticeable pale pink stripe along its lateral line, rather large eyes and a definite knob on its protruding lower jaw, Betty correctly identified it as a redstripe rockfish Sebastes proriger (page 180, Coastal Fishes of the Pacific Northwest 2).
Betty’s sighting occurred very shallow for this species which is seldom seen by divers at all. When encountered, the redstripe rockfish is usually lurking below 100 ft (30 m.).

Fantastic Flatfish

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This issue’s topic arrives courtesy of diver and underwater photographer Johanna Raupe of Granite Falls, Washington. On September 10th of this year, Johanna and her neophyte dive buddy Kimber Chard, of Edmonds, Washington had decided to dive Seacrest Cove 2 (aka Alki Cove 2). An 8:30 AM start was chosen and the Wreck of the Honey Bear would be the first objective. From there, the two would explore the pilings on the way back.

While photographing a scallop in about 50ft (15m) of water near the pilings, Johanna noticed a small ‘white’ flatfish emerge from under some nearby algae. She was able to take a number of shots of which the accompanying image was the best for identification. A resourceful photographer, Johanna has found that flatfish often appear inquisitive and react favourably to the ‘flash’ from a strobe – perhaps anticipating food. She knew it was a flatfish, albeit a very weird one!  But which one was it?

Johanna’s strange specimen is actually a rock sole Lepidopsetta bilineata. Although its typical ‘upside’ colour is almost all missing, a round outline and lateral line with a definite arch over the pectoral fin provide enough information for species determination.

This particular specimen has a condition that is called piebald whereby a significant amount of pigment is lacking from the eyed (or coloured) side of its body. This phenomenon is a rarely seen genetic mutation and has been documented for several species of flatfishes. Likely this colour pattern is disadvantageous for its ‘bearer’ thus accounting for the rarity of its observation.

A CROWD OF CRABS

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Laurels-juv-crabsOn July 2, 2011, Seattle area divers Laurel LaFever, of Bellevue, Greg Oliver, of Kirkland and Steve Martino, of Bothell made a dive at the Mile Marker 4, between Sekiu and Neah Bay, on the Olympic Coast of Washington. This dive was one of five that a group of Bubbles Below staff completed as part of a three day weekend to this spectacular area. Curley’s Resort, a well known Sekiu diver-friendly facility provided air and accommodation.

Mile Marker 4 is a shallow shore dive and on this day, the threesome took advantage of about 40ft (12m) visibility and enjoyed a 70 minute dive to a maximum depth of 21ft (7m). While exploring a zone of red and brown algae near a large bed of eelgrass, they found a single swarm of small crabs that numbered at least a couple of hundred. Laurel obtained the accompanying photograph and forwarded it with questions about an identity for the subjects and what this gathering might represent.

What Laurel and her buddies had encountered was an impressive cluster of juvenile Dungeness crabs (about an inch across) Cancer magister huddling upon some brown algae.
Like a majority of other Arthropods (crabs, shrimps and their relatives), after hatching, a Dungeness crab spends the first few months of its life as a pelagic (floating) larva. The last version of several stages, bearing no resemblance to an adult, is called a megalops. Barely visible to a diver, this form recruits to the typical adult bottom habitat and then metamorphoses into a recognizable young crab.

The tiny crabs Laurel and her buddies encountered were survivors of this process, possibly released by the same female. For those of us who enjoy watching and eating Dungeness crab, this encounter bodes well for a good population of Cancer magister along the Olympic Coast several years hence. ■

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