Not necessarily.

Wuchang fish has many thorns, but the finished dishes of Wuchang fish are more expensive than ordinary freshwater fish. Therefore, the price is not necessarily related to the number of thorns, but to the species of fish.

The number of thorns on the same species of fish is the same.

Only the thorns on different kinds of fish are different.

Generally speaking, marine fish (saltwater fish) have fewer spines than freshwater fish. But not absolutely.

Because, we can't generalize that freshwater fish have more fishbones than marine fish. It's just that the river fish we usually eat are mostly low-grade fish, while the marine fish we often catch are high-grade.

This is because the general trend of biological evolution is that the number of bones tends to decrease, and fish with less bony spurs are relatively advanced in evolutionary sequence, such as perch and flounder. On the contrary, the number of bone spurs is more, such as 387 pieces of silver carp's net skull, and the number of bone spurs of anchovies is also quite large. However, there are also some river fish with few bone spurs, such as freshwater pomfret, mandarin fish and perch.

Whether it's rivers, lakes or seas, the more vulnerable or vulnerable fish are, most of them are prickly, and some small floating fish are even covered with thorns in their muscles. This is probably the evolution of their self-protection. First, let the attackers know that I am prickly and not delicious. Second, the living environment is bad, and I need a flexible body with delicate bones to escape the disaster. Fierce fish, such as sharks, killer whales in the sea, snakeheads and catfish in rivers, have no thorns except their backbone.

Therefore, generally speaking, marine fish have fewer thorns and taste better than freshwater fish.

Thank you ~ ~