Natures wonders: walking fish have not evolved (Introduction)

by David Turell , Tuesday, January 21, 2020, 23:12 (1557 days ago) @ David Turell

Sharks have been present in a large number of varieties for 455 million years with the larges number in existence at c. 360 mya, before many varieties disappeared:

https://www.sharksider.com/evolution-of-sharks/

"A number of walking sharks are known with new ones just found:

https://cosmosmagazine.com/biology/new-sharks-and-rediscovered-rays?utm_source=Cosmos+-...

"The first success, reported in the CSIRO’s Marine and Freshwater Research journal, increases to nine the number of known species of sharks that use their fins to walk in very shallow water during low tides.

***

“'Data suggests the new species evolved after the sharks moved away from their original population, became genetically isolated in new areas and developed into new species,” Dudgeon says.

“'They may have moved by swimming or walking on their fins, but it’s also possible they hitched a ride on reefs moving westward across the top of New Guinea, about two million years ago.”

"Sharks they may be, but the only creatures that should be concerned are small fish and invertebrates.

“'At less than a metre long on average, walking sharks present no threat to people but their ability to withstand low oxygen environments and walk on their fins give them a remarkable edge over their prey of small crustaceans and molluscs," Dudgeon says."

Comment: These sharks have walked on the ocean bottoms for millions of years, but have not decided to try to enter up on land in any way. It is really unclear why animals make an attempt for new activity or not. Perhaps new bodily forms are required to be offered in advance by design. It is logical that any attempt requiring new bodily designs would be much easier to achieve if the body designs are created beforehand. Why try to attempt a difficult advance if it not entirely necessary? What would force it by being completely necessary or death would occur? 99% of all species are gone. That provides the obvious answer. Most species can't do it and end up by 'bad luck' as Raup pointed out. Yet evolution proceeded to complexify all along at a steady rate with large advances in the gaps. Thus logically most species cannot make the advances by themselves, so self-improvement is a very doubtful theory. Therefore, logically a designer is required to maintain the process of producing very complex advances.