Beachgoers were shocked to discover an oarfish — a creature whose appearance, according to folklore, can be a good omen or a ...

Lion's Mane jellyfish were spotted in Dublin, Ireland; several beaches in Mexico's Sinaloa state were closed after hundreds of reported stings; and several Portuguese man-of-wars (a jellyfish ...

A luminous jellyfish with long trailing tentacles is a beautiful sight, as long as a scuba diver sees it in time to avoid contact. These scuba divers were finishing a dive in Akumal, Mexico and ...