Outside the Francevillian lagoon, oceans still lacked phosphorus and carried little oxygen. Larger creatures would have struggled in those harsh surroundings.

These bubbles likely popped up and fizzled out a couple of times before overall conditions spread. Once they did it would have almost been like Star Wars, previously isolated "planets" with their own evolutionary past and possibly drastically different lengths of evolution before mixing.

Squids might be so weird because they were from a different pocket than everything else, it would explain why their DNA is so "alien".

[–] Mondez 12 points 2 weeks ago (3 children)

Squid still use the same DNA code though, they might be wierd but they aren't totally different evolutionary tree wierd.

[–] AmidFuror@fedia.io 14 points 2 weeks ago (2 children)

By DNA code, you may mean the genetic code - the translation of nucleotide triplet codons to amino acids. Or you may mean the DNA sequence in general.

Squids very clearly evolved within the cephalopods, and there is strong molecular and anatomical support for this. Squids did not evolve separately early on in the history of life.

[–] Mondez 2 points 2 weeks ago (1 children)

I specifically meant the condon sequences but they also share conserved sequences with other forms of life so both interpretations are actually true.

[–] AmidFuror@fedia.io 2 points 2 weeks ago

Yeah, they fit in on all levels. They use the universal genetic code. They're eukaryotes with mitochondria. They're cephalopods along with octopuses and cuttlefish.