Maratus is a spider genus of the Salticidae family (jumping spiders). These spiders are commonly referred to as peacock spiders due to their colorful abdominal flaps that they display during courtship. In at least one species, Maratus vespertilio, the expansion of the flaps also occurs during ritualised contests between males. All described species, except M. furvus, are endemic to Australia. (Photo by Jurgen Otto)

“Sperm whale opening it's huge mouth, Ogasawara Islands, Japan. Sperm whales are the biggest carnivorous animals on the planet. Each teeth in the mouth of adult specimen weights more than 1 kilogram. Interestingly enough that modern marine biologists believe that these teeth despite being fearsome play little role in capturing and eating giant squid – with their main function being mainly ritual aggression between males!”. (Photo by Alexander Safonov)

Mystical Forest. Tracey Jennings photographed this seven-gill shark in a kelp forest just off the shore of Simon's Town near Cape Town, South Africa. You don't need to travel far from cities to visit Narnia. This 7 gill shark was photographed in a kelp forest just off the shore of Simonstown near Cape Town, South Africa. (Photo by Tracey Jennings/National Geographic Travel Photographer of the Year Contest)

Open jaws of a Great White Shark Carcharodon Carcharias, South Africa. (Photo by Stephen Frink Collection/Alamy Stock Photo)

Samy Rose Moshiri, an Iranian American artist and activist, covers the mouth of Belarusian activist Yadviga Krasovskaya after dousing themselves in fake blood on stage at a Freedom Rally for Iran, in support of Iranian women and against the death of Mahsa (Zhina) Amini, outside City Hall in Los Angeles, California, U.S., October 1, 2022. (Photo by Bing Guan/Reuters)