Lanthanum.
Lanthanum Species Composition:
50% Goliath Bird-Eating Tarantula
12.5% Red Harvester Ant
12.5% Bulldog Ant
12.5% Indian Red Scorpion
12.5% Coconut Crab
Completion:
15/15, 1/1, 100%.

Science was  so preoccupied with whether or not it could that it didn't stop to think if it should.
It should've stopped at 3.