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
Fish come in many different shapes.
There is no single fish unified fish body plan.
However you will note the for example Dolphins and extinct Ichthyosaurs converged independently to a certain fishy bodyplan.
The best shape is always dependent on the environment the food you eat and the stuff that might eat you and what sort of bodyplan you already have to adapt from.
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