Polar fish experience lower mortality than tropical fish, allowing them to delay reproduction until later in life when they are larger and can produce more eggs, according to a study by Mariana ...

In sea urchin and salmon sperm, the pH value regulates whether they remain immotile or swim. • An enzyme as a pH sensor: A rising pH activates soluble adenylyl cyclase (sAC) in sea urchins and fish.

A consistent metabolic ratio found across 133 Chinese marine and freshwater fish species provides new evidence in support of the idea that fish become sexually active – and spawn for the first time – ...