The term "Order Plectognathi" refers to a group of fish that have a unique jaw structure and fused teeth. There are several synonyms for this term, depending on the context. In scientific literature, the order may be referred to as "Tetraodontiformes," which encompasses a wider range of fish with similar features. Other possible synonyms include "pufferfish," "blowfish," and "toadfish," all of which are commonly recognized by the general public. These fish are known for their ability to inflate their bodies, making them difficult for predators to swallow. While some species are often kept in aquariums, others are consumed as delicacies in certain cuisines.