Xiphoid-Like Body Plan Evolved Independently From Eels

It looks like an eel but is not one.

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Convergent evolution occurs when unrelated species develop similar traits due to similar environmental pressures.

Despite its elongated, serpent-like appearance, the oarfish is not closely related to true eels. It belongs to the order Lampriformes, distinct from Anguilliformes, which includes eels. The similar body shape represents convergent evolution rather than shared ancestry. Both lineages independently evolved elongation suited to specific ecological niches. The resemblance can mislead casual observers. Classification reveals deep evolutionary divergence. Shape does not equal kinship.

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Imagine two creatures stretching meters long and undulating through water, yet separated by millions of years of evolutionary history. Convergent evolution repeatedly produces ribbon-like forms in aquatic environments. The ocean rewards elongation under certain conditions. The oarfish’s scale exaggerates that pattern to extreme levels. It is an evolutionary echo amplified.

Understanding convergent evolution helps scientists reconstruct phylogenetic relationships accurately. Superficial similarity can mask profound genetic difference. The oarfish demonstrates how extreme morphology can arise multiple times independently. Evolution experiments with length repeatedly. Sometimes the result becomes legendary.

Source

Encyclopaedia Britannica

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