Limited fossil records and genomic information has made it difficult to determine the evolutionary history of squid and cuttlefish, until now. Published in @natecoevo.nature.com, @cephagus.bsky.social and team identify the ‘long fuse’ that led to today’s diversity: www.oist.jp/news-center/...

Pablo Villar et al discover male octopus mating arms are sensory organs used to find females, navigate internally to the oviduct & deliver sperm. From behavior to structure, these findings offer a framework for how sensory systems shape reproduction & species barriers www.science.org/doi/10.1126/...

Our new paper on squid and cuttlefish evolution is out in @natecoevo.nature.com : www.nature.com/articles/s41... /1

This curious worm uprooted itself from the sand like a carrot being pulled up by an invisible person, and rolled around in the current for a bit before starting to dig itself back in. You can see the sand grains slowly traveling over some mucous layer as it slowly reverses into the sand.

The so-called Pikachu nudibranch (Thecacera pacifica) going about its business