Cardinalfish

The Cardinalfish (Apogon imberbis) is a marine (saltwater) fish in the Apogonidae family. It is also known as the Mediterranean Cardinalfish or the King of the Mullets.

The Cardinalfish has a compressed body with a large head and a large mouth. Its lower jaw protrudes over its upper jaw. It is reddish-pink with a round black eye. It has two or three dark spots on the base of its caudal fin. 

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Springtail

The Springtail (Microfalcula delamarei) is a micro-small, wingless hexapod. A hexapod has three pairs of legs (6 legs), but it is not an insect. 

It is entognathous, which means that is has internal mouthparts in a gnathal (jaw) pouch. It is in the Collembola class and the Entomobryoidea super-family – like a terrestrial crustacean, because scientists think that it evolved from marine (saltwater) shrimp, crabs, and lobsters. Scientists first thought that it was an insect, but they have now changed the category to an entognathous animal.

The Springtail has three parts: the head capsule, a thorax (with three segments and 6 legs), and an abdomen (with five segments). Therefore, it looks like an insect. It has small antennae, two eyes, and mouthparts. The mouthparts have a pair of jaws. The two eyes are called composed eyes, because they are composed of 8 single eyes. It does not have a throat, so it breathes through a porous cuticle. 

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What is the jaw strength of the Hyena?

The Spotted Hyena (Crocuta crocuta) is a scavenging carnivorous African mammal. It has one of the strongest bite strengths of any mammal due to its strong jaws.

A dog, for example, such as a Mastiff or Rottweiler, has an average bite strength of 325 pounds per square inch. An African Lion has a bite strength of 650 pounds per square inch. A Bengal Tiger has a bite strength of 1,050 pounds per square inch. The Spotted Hyena has a bite strength of 1,100 pounds per square inch.

A Great White Shark has an average bite strength of 625 pounds per square inch. A Hippopotamus has an average bite strength of 1,825 pounds per square inch. The animal with the strongest bite strength is the crocodile at 3,700 pounds per square inch.

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