Bootlace worm
Animal
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The bootlace worm is a species of ribbon worm and one of the longest known animals, with specimens up to 55 m long being reported. Its mucus is highly toxic. Wikipedia
Scientific name: Lineus longissimus
Class: Anopla
Phylum: Nemertea
Order: Heteronemertea
Domain: Eukaryota
Family: Lineidae
Genus: Lineus