Triggerfish can discriminate and see certain color patterns better than humans.
Acid from burning carbon dioxide and fossil fuels, which enters oceans, has forced fish to change their body clock and pretend it's always night time in order to survive.
If you have the ability to change sex up to 20 times, would you stay faithful to your mate, like the chalk bass? Apparently, this bass is not all about that bass.
We've all heard about how noise pollution negatively impacts marine environments. But a recent study suggests that motor boats, rather than large cargo ships, easily stresses young damselfish which ultimately gives their predators the upper hand.
"Twilight zone" reef fish face numerous threats when diving deep underwater, but those with forked tails may have an advantage: they can swim quietly past predators and evade natural disasters such as cyclones and coral bleaching.
Butterflyfish depend on food and shelter provided by coral reefs, but they steer clear of those that have come in contact with seaweed. Researchers suggest this may be a strong indicator of their awareness of reef health.