Jellyfish Can Regrow Their Tentacles, And We Finally Know How : ScienceAlert

Jellyfish don’t seem to have a lot going on. They’re gelatinous blobs that have neither brains, nor hearts, nor blood, often at the mercy of where ocean currents take them.

But that doesn’t mean they are simple. Far from it. They’re extremely efficient, making them one of the most successful animal groups on the planet.

One of the keys to that success is their tentacles – long tendrils that entangle their prey, delivering paralyzing toxins that allow the jellyfish to digest in peace. If something untoward happens to those tentacles, the jellyfish can simply regrow them, in a very short…