First venomous crustacean discovered

Scattered throughout Mexico and central America are pools where water surfaces from underground networks of caves, which the ancient Maya said were gateways to the underworld. Biologists have now found that these bodies of water are home to a mysterious real-world creature as well: the first venomous crustaceans known to science.

The crustacean in question, Speleonectes tulumensis, belongs to the remipedes, a group first described in 1981. Observing these pale, blind and tiny animals in their natural habitat has been hard because they live in labyrinthine cave networks that are as difficult for divers to navigate as they are dangerous. Nonetheless, biologists including Björn von Reumont and Ronald Jenner, both of the Natural History Museum in London, found remipedes tossing away empty exoskeletons of shrimp, presumably having fed on them.

Source: Here