I believe they are Sea Salps or "salpa" https://en.wikipedia.org/wiki/Salp
What is this thing?
Let us help you identify that mysterious object you’ve found.
Currently in CHALLENGE mode: If you've got something obscure knocking about, post a picture, and let's see how we do. Please prefix such posts with "CHALLENGE:" so we know we've got a fighting chance.
Thanks, I hate it.
From (Spanish) Las salpas, las extrañas criaturas que llenan las playas de Málaga
estos invertebrados no tienen nada que ver con las medusas, por lo que no son urticantes, (...)
"Son el paso intermedio entre los invertebrados y los vertebrados, puesto que tienen una primitiva columna, y forman parte del plancton, la sopa marina que es la base de la cadena alimenticia en el mar", ha manifestado.
These invertebrates have nothing to do with jellyfish, so they are not stinging, (…)
“They are the intermediate step between invertebrates and vertebrates, since they have a primitive column, and they are part of plankton, the marine soup that is the base of the food chain in the sea,” he said.
Whoa thanks for the info! Some of them look pretty scary when they're long.
Tunicates are rad.
Oh that's just the evolution of micro plastics.