Some animals living inside water do not have gills. Name two such animals. How do they breathe?

Q. Whales and dolphins like fishes live in water. But they do not have gills. How do they breathe?

Q. Name some aquatic animals. How do they breathe?

Q. The sea animals like dolphins and whales do not have gills. How do they respire?

Q. Consider the following four statements (a-d) about certain desert animal. such as kangaroo rat.
(a) They have dark colour and high rate of reproduction and excrete solid urine.
(b) They do not drink water, breathe at a slow rate to conserve water and have their body covered with thick hairs.
(c) They feed on dry seeds and do not require drinking water.
(d) They excrete very concentrated urine and do not use water to regulate body temperature.
Which two of the above statements for such animals are true?

Q. Aerial animals have gills for breathing.