Psychedelica is perhaps even more apt given the cockamamie way the fish swim, some with so little control they look intoxicated and should be cited for DUI.
Members of Histiophryne psychedelica, or H. psychedelica, don't so much swim as hop. Each time they strike the seafloor they use their fins to push off and they expel water from tiny gill openings on their sides to jettison themselves forward. With tails curled tightly to one side –which surely limits their ability to steer – they look like inflated rubber balls bouncing hither and thither.
See a QuickTime video of a juvenile hopping along – it's also being buffeted by currents – at http://uwnews.org/article.asp?articleID=47496.
While other frogfish and similar species are known to jettison themselves up off the bottom before they begin swimming, none have been observed hopping. It's just one of the behaviors of H. psychedelica never observed in any other fish, says Pietsch, UW professor of aquatic and fishery sciences and curator of fishes at the UW Burke Museum of Natural History and Culture. He's the lead author of a paper about the new species that's now online at Copeia, the journal of the American Society of Ichthyologists and Herpetologists. His work is funded by the National Science Foundation.
It was little more than a year ago that the fish with rare, forward-facing eyes like humans and a secretive nature was the subject of worldwide news coverage after having been observed in the busy harbor of Ambon Island, Indonesia. An adult fish was observed in January 2008 by Toby Fadirsyair, a guide, and Buck and Fitrie Randolph, two of the co-owners of Maluku Divers, which is based in Ambon. They and co-owners Andy and Kerry Shorten eventually found Pietsch to help them identify the fish. Since the first sighting divers have observed a number of adults and juveniles, now that they know what to look for.
Adults of H. psychedelica are fist-sized with gelatinous bodies covered with thick folds of skin that protect them from sharp-edged corals as they haunt tiny nooks and crannies of the harbor reef. Fins on either side of their bodies have, as with other frogfish, evolved to be leg-like, and members of H. psychedelica actually prefer crawling to swimming. See a QuickTime video of them crawling at http://uwnews.org/article.asp?articleID=47496.
He was right. But what an unusual member it turned out to be.
Compared to other anglerfish, members of H. psychedelica have no lures. Most anglerfish have lures growing out of their foreheads. The other anglerfish sit right out in the open on the seafloor or coral reefs, often adapting their coloring so their bodies are camouflaged, but the lures are meant to be noticed so the fish wave, wiggle and sometimes blink the lures on and off in order to attract pray, Pietsch says.
Instead of all that showiness, members of H. psychedelica are shy and secretive, probably one of the reasons they weren't previously spotted. When a member of H. psychedelica is uncovered by divers it usually seeks a new place to hide within 10 or 15 minutes.
And while other anglerfish change their coloring depending on the environment, the new species appears to maintain its wild striping no matter the surroundings.
The coloring led co-author David Hall, a wildlife photographer and owner of seaphotos.com, to speculate that the fish is mimicking corals. Indeed, Hall produced photos for the new scientific paper showing corals the animals may be mimicking.
The other co-author, Rachel Arnold, who is a UW master's student in aquatic and fishery sciences, did the DNA work on the new species. Arnold, who dove in Ambon Harbor last year, said the striping of each fish is distinctive, "like a fingerprint of patterning on their body so from whatever angle you look, you can tell individuals apart."
The scientists found, however, that the vivid colors faded in a matter of days once a specimen was preserved in ethanol. The flesh of the preserved specimen looks white, but with a microscope one can still see the striping, Pietsch discovered.
This got him thinking about two specimens sent to him in 1992 that he'd kept as part of the UW's fish collection. The Dallas Aquarium had sent him two frogfish, found in a shipment of live fishes from Bali that they said had unusual pigment patterns. The staff had nicknamed them "paisley frogfish." But the photograph Pietsch was sent was of poor quality and the preserved specimens Pietsch received were white, so he didn't give them much thought.
Pietsch retrieved the old specimens from the collection, put them under a microscope and found the striping distinctive to H. psychedelica. He'd had two specimen of a new species of fish for 17 years, but didn't know it.
Sandra Hines | EurekAlert!
Transforming plant cells from generalists to specialists
07.12.2016 | Duke University
What happens in the cell nucleus after fertilization
06.12.2016 | Helmholtz Zentrum München - Deutsches Forschungszentrum für Gesundheit und Umwelt
In recent years, lasers with ultrashort pulses (USP) down to the femtosecond range have become established on an industrial scale. They could advance some applications with the much-lauded “cold ablation” – if that meant they would then achieve more throughput. A new generation of process engineering that will address this issue in particular will be discussed at the “4th UKP Workshop – Ultrafast Laser Technology” in April 2017.
Even back in the 1990s, scientists were comparing materials processing with nanosecond, picosecond and femtosesecond pulses. The result was surprising:...
Have you ever wondered how you see the world? Vision is about photons of light, which are packets of energy, interacting with the atoms or molecules in what...
A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.
Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...
In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.
“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...
The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.
The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...
16.11.2016 | Event News
01.11.2016 | Event News
14.10.2016 | Event News
07.12.2016 | Earth Sciences
07.12.2016 | Earth Sciences
07.12.2016 | Materials Sciences