Pufferfish

Pufferfish are unique and intelligent marine fish belonging to the family Tetraodontidae, known for their ability to inflate their bodies when threatened. They have strong jaws with fused teeth, forming a beak-like structure used to crush hard-shelled prey such as snails, crabs, and clams. 

In saltwater aquariums, species like the Dogface Puffer and Porcupine Puffer are admired for their curious personalities and engaging behavior. However, they are best kept by experienced aquarists due to their specialized dietary needs, large adult size, and tendency to nip at invertebrates or slow-moving tankmates. Pufferfish require a spacious, well-maintained aquarium and should be handled with care, as many species contain toxins in their organs or skin.