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Google and Facebook have figured out that I like seeing the latest palaeontological announcements, so I'm always seeing headlines like this one on an early Triassic lizard.

This always spurs me to poke around the net about some facet of the article. For this one, I looked up "Early Triassic" to get a sense of what that meant. I ended up on this image of marine life at the time. I noticed some disk shaped fish that looked, to me, like Permit or a Sunny.

I wondered, "What ecological niche are disk shaped fish exploiting? Why is this particular body type - or any body type for that matter - repeating itself 250 million years later".

I'd like to ask this of a Stack Exchange forum. So, is there a particular reason there isn't an Evolution forum?

marked as duplicate by Shadow The Curly Braced Wizard discussion Jan 31 at 15:12

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

  • There isn't because nobody proposed it, or at least not successfully. New sites are created as result of someone starting the process on Area 51, see more details in the dupe. – Shadow The Curly Braced Wizard Jan 31 at 15:13
  • I was not asking how to propose a a new site. – dwstein Jan 31 at 16:23

There's a Biology site it has an tag with the following description

Changes in the heritable attributes of populations of organisms over time. The mechanisms of evolution are mutation, migration, drift, and selection.

That seems to be along the right lines for your question. As always check the site's help centre for more information

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