Fish are so abundant in the ocean (even given how humans overfish, and them often being prey), I kind of wonder
1. Why don’t marine animals converge to a more fish like form? (Aside from say land mammals like whales and dolphines who decided they want to go to the sea)
2. What benefits are there in having a fish-like form in the ocean? It must be evolutionarily advantageous for some reason.
3. Did the first non microscopic multicellular beings have fish-form?
In: Biology
There is no such thing as a fish. So that is exactly what has happened.
From Wikipedia:
[after] a lifetime studying fish, the biologist Stephen Jay Gould concluded that there was no such thing as a fish. He reasoned that although there are many sea creatures, most of them are not closely related to each other. For example, a salmon is more closely related to a camel than it is to a hagfish.[8]
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