Oh but from a biological perspective they are a whole different case. The general rule would be that fish doesn’t lay this type of eggs (with specific layers and a hard shell). Amphibians neither. And then, evolutionary speaking, came the amniote egg. With feats that work as an adaptation to earth’s dry environments, without water. It’s really a ‘deal breaker’ and as such it’s treated by biology books because we split all animals between those that have such eggs and those who don’t…
Fish have eggs.
Do they produce chickens?
Chicken of the sea
Shark eggs are absolutely wild
Oh but from a biological perspective they are a whole different case. The general rule would be that fish doesn’t lay this type of eggs (with specific layers and a hard shell). Amphibians neither. And then, evolutionary speaking, came the amniote egg. With feats that work as an adaptation to earth’s dry environments, without water. It’s really a ‘deal breaker’ and as such it’s treated by biology books because we split all animals between those that have such eggs and those who don’t…