air-breathing fish
... that underwater thumps and moans in a West African swamp may indicate the presence of certain air-breathing fish?
... that underwater thumps and moans in a West African swamp may indicate the presence of certain <b id="mwCUI"><a href="./West_African_bichir" id="mwCUM" rel="mw:WikiLink" title="West African bichir">air-breathing fish</a></b>?