lungfish
Concise Oxford English Dictionary © 2008 Oxford University Press:
lungfish/ˈlʌŋfɪʃ/
▶noun (pl. same or lungfishes) an elongated freshwater fish with one or two sacs which function as lungs, enabling it to breathe air and lie dormant in mud to survive drought. [Subclass Dipnoi: several species.]
'lungfish' also found in these Oxford entries:
