Puffer Fish

Common Names: Puffer fish, puffers, balloonfish, blowfish, bubblefish, globefish, swellfish, toadfish, toadies, honey toads, sugar toads, and sea squab

Scientific Name: Tetraodontidae

Adaptations: The puffer fish is fast, has excellent eyesight, has modified scales (spines), fills itself with water and puffs up when threatened, and contains a deadly poison called tetrodotoxin.

Hunting: Puffer fish are equipped with four large teeth to crush the shells of crustaceans and mollusks.

Reproduction: Spawning occurs when male puffers push females to the water's surface or join females already present. The spherical, buoyant eggs hatch after about four days.

Interesting Facts: 

1. Puffer fish, a delicacy in demand (fugu), can be lethal if not served properly.
2. Puffer fish are believed to be the second most venomous vertebrae in the world. Their toxin is a 100 times more potent than cyanide. 
3. The oldest known puffer fish genus is Eotetraodon. 

I researched this animal because it is interesting that something with an appearance so whimsical can be so lethal.