Which tropical fish species is best known for splitting pressurised water jets to shoot prey out of the air and is a “smart” animal, according to research?

a. Goldfish

b. Angel fish

c. Archefish

d. None of the above

ANSWER: Archefish

Explanation:

A tropical fish can tell one human face from another despite lacking a brain section that homo sapiens and other "smart" animals use for this task, scientists said on June 8, 2016

The astonishing ability was demonstrated in experiments with eight archerfish, a tropical species best known for spitting pressurised water jets to shoot prey out of the air

Instead of aiming at bugs, the sharpshooting fish were taught to spit at pictures of human faces displayed on a computer monitor suspended over their aquarium.

The fish, which require excellent vision for hunting, were first introduced to two faces, and conditioned to spit at one of them in exchange for a food reward.

The researchers then tested whether the fish would recognise, and spit at, the familiar face among 44 new ones.

The fish got it right more than 80 percent of the time.

Understanding fish intelligence may shed light on our own brain function- whether facial recognition is an innate or learned ability