ɪn sˌʌm slˈoʊmˈuːvɪŋ ɹˈeɪdɪəli sɪmˈɛtɹɪkəl mɚɹˈiːn ˈænɪməlz sˈʌtʃ ɐz sˈiːtˈɛnəfˌoːɹz ænd sˈiːnɪdˈɛɹiənz ɪŋklˈuːdɪŋ sˈiː ɐnˈɛməniz ænd dʒˈɛlɪfɪʃ, ðə nˈɜːvz fˈɔːɹm ɐ nˈɜːv nˈɛt, bˌʌt ɪn mˈoʊst ˈænɪməlz ðeɪ ɑːɹ ˈɔːɹɡənˌaɪzd lˈɔndʒɪtˌuːdɪnəli ˌɪntʊ bˈʌndəlz.
In some slow-moving radially symmetrical marine animals such as ctenophores and cnidarians (including sea anemones and jellyfish), the nerves form a nerve net, but in most animals they are organized longitudinally into bundles.