TurbellariansTurbellarians are flatworms that live on the ocean floor. They are free swimming and eat only meat, meaning they are carnivorous. Being only ten centimeters long, these flatworms are also very colorful. The way turbellarians move is very intresting. They have cilia and mucus on the bottom of them that let them glide over the ocean floor. They almost look like a flying carpet.
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Class Trematoda
The picture is of a fluke, a creature belonging to Class Trematoda. Just like other animals in Phylum Platyhelminthes, flukes have bilateral symmetry. they also possess parasitism relationship with whatever creature it lives in. In their life they will inhabit clams, snails, and sometimes fish in the larval stage, then in the adult stage they live in animals with vertebrate, like whales. In order for the whale to host the parasite they must eat what animal was hosting it in its larval stage. Overall, flukes are parasitic and are bad for all creatures.
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Tapeworms
Tapeworms have long stringy body, less the reason why they are part of the flatworm category. They get their food from sucking out the nutrients from the host's intestines, the reason why they get their food from the intestines is they do not have a stomach to digest food for them. tapeworms can live in land and aquatic creatures with vertebrate. In one case a tapeworm was pulled out of a sperm whale; when they measured it later the tapeworm was 50 feet long! Like flukes you do not want one of these in your body.
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Reproduction
Animals in Platyhelminthes can have both asexual and sexual reproduction. Scientist and Marine Biologist are unsure how they reproduce so there really is not anything else to state.