ðeɪ ɑːɹ kˈɑːmənli nˈoʊn æz wˈʊlftɹæp ˈæŋɡlɚz ɔːɹ wˈʊlftɹæp sˈiːdɛvəlz bɪkˈʌz ʌv ðɛɹ dɪstˈɪŋktɪv ˌʌpɚ dʒˈɔːz wɪð mˈuːvəbəl pɹɪmˈæksɪlɚɹiz ðæt kæn biː lˈoʊɚd tə fˈɔːɹm ɐ kˈeɪdʒlˈaɪk tɹˈæp ɚɹˈaʊnd ðə mˈʌtʃ ʃˈɔːɹɾɚ lˈoʊɚ dʒˈɔː.
They are commonly known as wolftrap anglers or wolftrap seadevils because of their distinctive upper jaws with movable premaxillaries that can be lowered to form a cage-like trap around the much shorter lower jaw.