Sharks are generally recognized sea predators, not having equal in bloodthirstiness. However, in their environment were “white crows” – vegetarians (to be precise – one omnivorous species). Near the southern coast of the United States, scientists discovered a species of shark, the “menu” of which is mainly plant food.
This is Sphyrna tiribo, a small hammerhead or shark that lives off the coast of Florida, California, Mexico and Brazil. Its characteristic feature is the propensity to vegetable food, even when there is no shortage of “meat dishes”. As shown by the research of the British Royal Society scientists, 62.1% of the intestinal contents of one of the caught shark sharks consisted of algae.
The fact that these sea animals eat algae was known before. Scientists, first of all, interested in the process of their digestion. To find out, the researchers placed five sharks in a laboratory pool and put them on a diet consisting of 90% of plant food (algae) and 10% of squid. The movement of food through the digestive tract was monitored with the carbon-13 isotope integrated into algae.
To the surprise of scientists, after some time sharks began to gain weight, in much the same way as young green sea turtles, which in the process of growing up are omnivorous, but becoming adults, finally become vegetarians.
During the next stage of the research, scientists intend to better understand the evolution of shark sharks, as well as its relationship with other species of sharks feeding on plants.js.src = “&version=v2.8”; 'script', 'facebook-jssdk'));