https://phys.org/news/2018-07-squishy-hydra-simple-circuits-ready.html

These beasties are survivors, and that makes them worthy of study, according to Rice electrical and computer engineer Jacob Robinson.

Robinson and his team have developed methods to corral the tiny, squid-like hydrae and perform the first comprehensive characterization of relationships between neural activity and muscle movements in these creatures. Their results appear in the Royal Society of Chemistry journal Lab on a Chip.