Manta Ray

Ricochet Feeding for Rays

Ricochet feeding for rays described in ScienceDaily 26 September 2018 and Science Advances 26 September 2018 doi: 10.1126/sciadv.aat9533. Manta rays are kite shaped fish that feed by filtering plankton from water flowing into their mouths as they swim.  The water, minus the plankton, then passes out through their gills.  This is an intriguing system for […]

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Trout swimming

Fish Evolve in a 100 Years

Fish evolve in a 100 years, claims an article in Science News 1 June 2018, with the headline: “This saltwater trout evolved to live in freshwater—in just 100 years,” referring to a study also reported in ScienceDaily 31 May 2018, and Molecular Ecology, 26 May 2018; doi: 10.1111/mec.14726. Steelhead trout live in the ocean off […]

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Fish on Beach

Back Flip Caused Fish to Evolve

Back flip caused fish to evolve, according an article in Nature News and Science (AAAS) News 15 February 2018. In 2014 Steven Balbus of Oxford University UK claimed that the moon was 10% closer to the earth 400 million years ago and this would have resulted in larger tides, which would have left fish stranded […]

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Bonnethead Shark

Grass Eating Shark

Grass eating shark found, according to Science (AAAS) News 7 January 2018 and Sci-News 9 January 2018. The bonnethead shark is a small coastal dwelling shark that forages for food amongst the seagrass meadows along the coasts of southern USA and the Gulf of Mexico. In 2007 environmental scientists examined the stomach contents of bonnethead […]

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Hydraulic Control for Tuna Fins

Hydraulic control for tuna fins found, according to Science (AAAS) News, ScienceDaily, and Stanford News Service 20 July 2017, and Science vol. 357, pp. 310-314 doi: 10.1126/science.aak9607, 21 July 2017. Bluefin tuna are large, fast and very agile fish. According to Stanford News, “Tuna have numerous morphological, physiological and behavioural adaptations to move rapidly through […]

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Speech Evolved From Fish

Speech evolved from fish, according to reports in BBC News and ScienceNOW, 17 July 2008 and Science, vol. 321, p 417, 18 July 2008. A group of American researchers have been studying the brain activity of the fish that communicate with sound. The midshipman fish makes a nest hole under rocks and makes humming sounds […]

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Sharks Have Nose for Heat and Cold

  Sharks have nose for heat and cold, according to a report in Nature Science Update, and ScienceNOW, 30 January 2003. Sharks are “the most temperature sensitive creatures we know,” says Brandon Brown, a physicist at University of San Francisco who studied electrical conductance of gel from pores in the sharks’ snouts called ampullae of […]

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Shark Teeth Didn’t Evolve

Shark teeth didn’t evolve, according to a report in New Scientist 18 February 2006, p17. Chuck Ciampaglio of Wright State University, Ohio has studied the teeth of marine predators, including sharks, reptiles and mammals “from the past 100 million years”. After measuring overall size, cross section, serrations and number of cusps he classified them into […]

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Seahorses and Salinity

Seahorses are normally found in marine environments but are they capable, or have they ever been capable of living in freshwater? A number of species are found in estuaries and can tolerate wide fluctuations in salinity, at least for short periods of time. In Tasmania, the Potbelly Seahorse inhabits the Tamar River estuary which, during […]

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Seahorse Shape Explained

Seahorse shape explained, (theoretically, that is) claim scientists in Nature Communications DOI: doi:10.1038/ncomms1168 25 January 2011, and BBC Earth News 26 January 2011. Sam Van Wassenbergh from the University of Antwerp in Belgium and colleagues have used high speed photography and mathematical modelling to determine how far a seahorse can reach out to capture prey. […]

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