In a recent study, researchers from Nagoya University in Japan have demonstrated that electric eels can release electricity potent enough to induce genetic modifications in small fish larvae. 

This ground-breaking study challenges the conventional belief that electroporation, a gene delivery technique in which an electric field is generated to create temporary pores in cell membranes to enable the entry of molecules like DNA or proteins into the  cells, is confined to laboratory settings.

Instead of a brain or eyes, brittle stars have nerve cords that run down each of their five arms, which join to form a nerve ring near the mouth. 

Nonetheless, according to a recent study, they possess the ability to learn by association, which involves making an association with different stimuli via a process called classical conditioning (like Pavlov’s dogs or us learning not to touch a pot of boiling water after we had been scalded before.