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It is bitterly cold and wintry in New York today. From Newfoundland to Georgia a winter super-storm is slamming the East Coast of North America (it goes by the amazing marketing name of “bomb cyclone”). As is frequently the case when I am dissatisfied with conditions here on Earth, my mind is wandering off to our sister planet, Venus, where temperatures are somewhat warmer.

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Back when I was a child in living in the countryside I had a lengthy bus-ride to school (this will get back to Venus in a moment). The elementary school library had a copy of The National Geographic Picture Atlas of Our Universe, an astonishing Cold-War era tome of facts and fantastical musings about space. Somebody always checked that book out (indeed, it disintegrated before I reached puberty) and so it got passed around the school bus as we rode to Waterford and back every day. One of the fantasy illustrations which has stayed with me was the painting of the “oucher pouchers” by Roy Gallant (?). These (entirely-imaginary) alien creatures lived on the molten hot surface of Venus, which I guess is why they said “ouch.” They had a plated, heat-proof hide and they were spherical, but if they became too hot, they blasted off into the atmosphere via some sort of posterior rocket-propulsion system (which was of great amusement to the children).

Through the magic of the internet, I found the picture, and I see that the ‘poucher is eating an ill-fated space probe to Venus. They also have scorpion tails (for hunting or protection or goodness only knows). Long-time readers know of my obsession with Venus. I wonder if it started with this concept art (which was made to get kids interested in space). I am including it here so you can think of the molten surface of Venus and of what sorts of life could flourish there, but it is also as a reminder to myself to write more about our nearest planetary neighbor. In 2018 we need to be more imaginative and we need to explore farther (and if anybody is good at engineering we need to do better at that too). This illustration from my childhood is a fun reminder to look back to our childhood dreams in order to look forward to new horizons.

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The Amazon River is renowned for having the greatest diversity of catfish of any river—oh, and it is also the largest river in the world too, I guess.  The river drains half of South America and its branches flows through many many different sorts of regions.  Near Tena in Ecuador, the river’s tributaries flow through a karst landscape of sunken limestone caves, streams and springs.  There, deep beneath the rainforest, scientists have discovered a catfish with a remarkable ability to climb walls—or perhaps I should say they have rediscovered a previously known fish and found out it has unexpected talents.

The cave-climbing catfish (photograph by Geoff Hoese)

The cave-climbing catfish (photograph by Geoff Hoese)

A team of naturalists led by Geoff Hoese found the catfish in a subterranean waterway jauntily climbing up a sheer 3 meter (10 foot) stone wall with a thin rivulet running down it.  Here is a link to a National Geographic article about the catfish—you can go there and watch a video of the catfish shimmying up and down water-slicked rocks. The scientists believe the fish is Chaetostoma microps, a member of the suckermouth armored catfish family (Loricariidae), a group of animals which Ferrebeekeeper has enthused about in past posts (although the fish’s identity remains unclear—since the team had no permit for taking specimens and left the creature unmolested still climbing its underground walls).

An illustration of Chaetostoma microps

An illustration of Chaetostoma microps

Chaetostoma microps is not notably specialized for cave life—it still has pigment and eyes, and lacks the marked asceticism of other true underdwellers like the pink catfish Phreatobius cisternarum (which lives beneath the water table!)  Chaetostoma microps feeds on algae—which is notably lacking from underground caves.  So what exactly is the fish doing down there? And how/why did it evolve its remarkable ability to climb rocks without much water?  The answers are unclear, but it seems reasonable to assume that a fish from the vertiginous yet cave-studded foothills of the Andes would need the ability to climb in order to maximize its habitat (and to prevent being sucked into an inescapable underground grotto).  Maybe Chaetostoma microps is really a mountaineer catfish.  Instead of leaping like salmon, it deals with its rocky treacherous home by suction, barbels, and indomitable spirit!

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