H. pylori can also spread through contact with contaminated water or food. The bacteria are believed to cause stomach problems when they penetrate the stomachâs mucous lining and generate substances that neutralize stomach acids. This makes the stomach cells more vulnerable to the harsh acids.. pylori can also spread through contact with contaminated water or food. The bacteria are believed to cause stomach problems when they penetrate the stomachâs mucous lining and generate substances that neutralize stomach acids. This makes the stomach cells more vulnerable to the harsh acids.
Food Preferences & Resources. Beluga whales are opportunistic feeders. They prey on about 100 different kinds of primarily bottom-dwelling animals. They eat octopus; squid; crabs; snails; sandworms; and fishes such as capelin, cod, herring, smelt, and flounder.
Of the 78 species of whales, 11 species are baleen whales, which means that they eat by straining small organisms into their mouth. The rest of the species fall under the category of toothed whales. All whales live in a marine environment, or the sea, except for four species of river dolphins that thrive solely in fresh water. Whales all share a few common features, like blowholes. Blowholes are the nostrils of the whale and are positioned on top of the head.