<P> Cnidarians form an animal phylum that are more complex than sponges , about as complex as ctenophores ( comb jellies ) , and less complex than bilaterians , which include almost all other animals . However , both cnidarians and ctenophores are more complex than sponges as they have : cells bound by inter-cell connections and carpet - like basement membranes ; muscles ; nervous systems ; and some have sensory organs . Cnidarians are distinguished from all other animals by having cnidocytes that fire like harpoons and are used mainly to capture prey . In some species , cnidocytes can also be used as anchors . </P>
<P> Cnidarians form an animal phylum that are more complex than sponges , about as complex as ctenophores ( comb jellies ) , and less complex than bilaterians , which include almost all other animals . However , both cnidarians and ctenophores are more complex than sponges as they have : cells bound by inter-cell connections and carpet - like basement membranes ; muscles ; nervous systems ; and some have sensory organs . Cnidarians are distinguished from all other animals by having cnidocytes that fire like harpoons and are used mainly to capture prey . In some species , cnidocytes can also be used as anchors . </P>
how do you know something is a cnidarian
how do you know something is a cnidarian
by having cnidocytes that fire like harpoons and are used mainly to capture prey .
by having cnidocytes that fire like harpoons and are used mainly to capture prey .