They mostly spawn a large number of small eggs with little yolk which they broadcast into the water column.
ðeɪ mˈoʊstli spˈɔːn ɐ lˈɑːɹdʒ nˈʌmbɚɹ ʌv smˈɔːl ˈɛɡz wɪð lˈɪɾəl jˈoʊk wˌɪtʃ ðeɪ bɹˈɔːdkæst ˌɪntʊ ðə wˈɔːɾɚ kˈɑːlʌm.