Q.

The goldfish (Carassius auratus) is a freshwater fish which cannot live in sea water. Such animals are described as

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a

eurythermal

b

stenohaline 

c

semelparous

d

euryhaline

answer is B.

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Detailed Solution

Some organisms are tolerant of a wide range of salinities (euryhaline) but others are restricted to a narrow range (stenohaline). Many freshwater animals (e.g., the goldfish) cannot live for long in sea water and vice versa because of the osmotic problems, they would face.

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