A three-and-a-half-year Saudi-led coalition war with Yemen's Houthi rebels in Yemen has caused the world's worst humanitarian crisis, with two thirds of the population — some 18 million people — relying on humanitarian aid. International aid agencies say 8 million Yemenis don't know where their next meal is coming from. An estimated 300,000 fishermen still ply the waters of Yemen's Red Sea coast, where heavy fighting has been underway for months as the coalition tries to pry the port city of Hodeida — a crucial lifeline for aid — from the Iran-aligned rebels. The fishermen try to avoid the coalition warships, which are on the lookout for weapons smugglers and rebels armed with rockets and explosives. The Houthis have carried out several attacks on ships off Yemen's coast. The governing body in charge of Red Sea fishing in Yemen, which is currently controlled by the Houthis, says more than 220 fishermen have been killed in more than 70 attacks since the fighting broke out in March 2015. The fishermen used to stay out at sea for 15 days at a time, but now the trips are much shorter, and the catches smaller. The price of fish has gone up as a result, making it too expensive for many Yemenis and further squeezing the fishermen. "Hunger is harder than fear," Ammar Ahmed, a fisherman said. "It's scary for me to go out because I don't know if I will return or not, but how do I live seeing my family not able to feed itself?"