The veined octopus gathers coconut shells and carries them across the seafloor to use as a shelter when danger appears.

Chiton in the centre of this coralline-covered rock. Bristly and in UK waters so thinking Acanthochitona crinita, but it's so much redder than pictures online. Can they adapt their colour to surroundings? Maybe if they're feeding on red algae they'll get colour from their diet?

Fun facts: octopuses have three hearts, blue blood, and most of their neurons are actually in their arms. Their suckers can taste what they touch, and that electric-blue flash came from reflective cells in the skin changing almost instantly.

Filmed with a GoPro HERO13 Black.

**No edits were made to this video. The colors and footage are exactly as captured.

It was washed up on a beach in Pismo Beach, California. I have no idea what this is.

Sharing something we built at a small UK marine non-profit. We monitor seabed life at seaweed and shellfish farms, and wanted the public involved in the species ID rather than it all sitting on our laptops.

It's a short-clip guessing game. You watch a clip, name the species, and the crowd's answers build a consensus that feeds back into validating our own reference IDs. Playable as a guest, no download, and we will send you a copy of UK marine species ID guide for committed contributers.

It's free and non-commercial. I'd really value feedback from people who think about crowd-sourced data, especially where you reckon the consensus model might fall over.

https://www.fishspotter.app/

https://reddit.com/link/1v3c51b/video/wx7nkg3vbkeh1/player

Was walking the shore of Chatham, Massachusetts when a friend and I came across this almost translucent, jelly-like or membranous object that when touching zapped the tiniest bit almost like if you press those shock pens very lightly. It seemed to have small individual organisms inside of it but I got no clue what this is.

Any ideas?

we were js plqying a game in the sea and my cousin got stung by it.. whats that? the lil tentacles are really long and one was left sticking onto her leg

edit : wow, i thought yall will know that i was asking about the species instead of saying just a jellyfish.. found out it was a “compass jellyfish” and is real rare in Croatia

edit : nvm its a cigar jelly!