1. Monte Bolca preserves a greater diversity of rays, including guitarfishes and electric rays . 2. It and other electric rays are used as model organisms for biomedical research. 3. The finless sleeper ray is the only electric ray that lacks dorsal fins. 4. Electric rays are found from shallow coastal waters down to at least deep.5. Like other numbfishes, the giant electric ray can deliver a painful electric shock. 6. This and other electric ray species are used as model organisms in biomedical research. 7. Jews, he believed, were trying to kill him with " poisoned electric rays ". 8. Up to long and weighing, the Atlantic torpedo is the largest known electric ray . 9. Unique amongst electric rays , there are no dorsal fins. 10. He became such a pest on the subject that his co-workers call him Electric Ray .
