With its huge eyes, comical name and diminutive size, Mark R. Smith’s image of a baby Hawaiian bobtail squid can’t help but raise a smile. A curiously endearing creature, the cephalopod is just 1.5cm across, its mantle cavity bearing more than a passing resemblance to a rather natty shower cap. But it is also a beautiful example of symbiosis – nature’s version of “I’ll scratch your back if you scratch mine” – for on the underside of the squid is a light organ which houses bioluminescent bacteria. The squid offers the bacteria protection and food, while the bacteria emit a glow – a handy trait that the squid uses to offset its silhouette, helping it to evade predators in the depths below. Mark R. Smith’s entry combines several images of a Hawaiian bobtail squid with different focus lengths to create a final picture with greater depth of field than normal. (Photo by Mark R. Smith/Wellcome Images/Macroscopic Solutions)

A child uses an umbrella to avoid rain falling on a fire at the northern Greek border point of Idomeni, Greece, Monday, April 25, 2016. Many thousands of migrants remain at the Greek border with Macedonia, hoping that the border crossing will reopen, allowing them to move north into central Europe. (Photo by Gregorio Borgia/AP Photo)

“Dog fighting is a form of blood sport in which game dogs are made to fight, sometimes to the death. It is illegal in most developed countries. Dog fighting is used for entertainment and may also generate revenue from stud fees, admission fees and gambling”. – Wikipedia

Photo: A bloody Afghan dog is bleeding with many wounds after he lost a dog fight November 24, 2006 in Kabul, Afghanistan. While the Afghan government is trying to ban the violent use of dogs for fighting, the unofficial sport remains a regular weekly event. Afghan dog fighting is popular among Afghan men who gamble on the dogs making upwards of 15,000 Afghanie (300 USD). (Photo by Paula Bronstein/Getty Images)

African migrants stranded in Costa Rica walk near garbage on the Inter-American highway at the border between Costa Rica and Nicaragua, in Penas Blancas, Costa Rica, September 8, 2016. (Photo by Juan Carlos Ulate/Reuters)

In this March 30, 2019 photo, Andrea Dovizioso of Italy falls from his bike during a Moto GP free practice run at the circuit in Termas de Rio Hondo, Argentina. Despite the fall Dovizioso raced in the third pole position on Sunday and finished in third place. (Photo by Nicolas Aguilera/AP Photo)

Women take part in the desert trek “Rose Trip Maroc”, on November 1, 2019 in the erg Chebbi near Merzouga. The Rose Trip Maroc is a female-oriented trek where teams of three must travel through the southern Moroccan Sahara desert with a compass, a map and a topographical reporter. (Photo by Jean-Philippe Ksiazek/AFP Photo)

Brazil's team performs in the artistic swimming acrobatic routine final at the Pan American Games in Santiago, Chile, Friday, November 3, 2023. (Photo by Matias Delacroix/AP Photo)

A Manchester City fan attends the trophy ceremony after the end of the Soccer Club World Cup final match between Manchester City FC and Fluminense FC at King Abdullah Sports City Stadium in Jeddah, Saudi Arabia, Friday, December 22, 2023. Manchester City won 4-0. (Photo by Manu Fernandez/AP Photo)