Complete the text with either the gerund or the infinitive

Penguins are birds that are adapted to [living|to live] in the water. Their wings are useless for [flying|to fly] in the air but are well-suited for [swimming|to swim] in the water. Dark backs and white bellies enable them [hiding|to hide] themselves from the predators. Predators have problems with [noticing|to notice] them against the light and dark water surface. The largest emperor penguins are described [being|to be] about 3.7 feet tall. They are born [living|to live] between 15 to 20 years. Penguins closer to the equator prefer [eating|to eat] fish to squid but those who live in Antarctica like [eating|to eat] squid and krill. Penguins are [finding|to be found] on every continent in the Southern Hemisphere from islands off South America to Antarctica. Smaller penguins enjoy [basking|to bask] in the tropical sun. Penguins with massive bodies prefer [setting up|to set up] their colonies in more severe weather conditions. Penguins are used to [spending|spend] up to 75% of their lifetime in the water. They do all their [hunting|to hunt] in the water. Penguins attack their food as they see it [swimming|to swim] by. Unfortunately, scientists watch the sea ice [thinning|to thin] by the year. Less ice meant that less territory is left for penguins [to settle|settling] on.