Which of the following fish contained lungs?

Explanation

Option D is correct since the group, Dipnoi owes its name from the presence of two internal nostrils. Standing on the basic piscine platform, dipnoans show many interesting features that the early fishes have gone through to become land vertebrates, especially the amphibians. They are the link between fish and amphibians. Option A is incorrect since Lampreys are ancient fish that have characteristics similar to the first vertebrates. They do not have lungs and do not breathe air. Option B is incorrect since Perch and other fish have an organ called the swim bladder which has lost its connection to the digestive system. It specializes as a lung or breathing organ and can regulate the amount of gas that is in the bladder. Option C is incorrect since the plaice does not contain lungs.