Disco clams may flash chemical-weapons warning
Puzzling streaky light show might tell predators not to bite
![](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2015/01/sm_2-clams.jpg?fit=860%2C460&ssl=1)
ICK, ICK A clam flashing reflected light off its lips may be warning predators that attempts to bite will not end well.
Courtesy of L. Dougherty