Octopus There are around 300 different known species of octopuses. They are a very diverse animal and can adjust to many different situations and inhabit multiple different parts of the ocean. They are a very unique animal and have some characteristics that exist only in a few other cepahlopods. In this paper I will talk about just two of the three hundred species of octopuses. The Blue-Ringed Octopus has a yellowish coloring and distinctive blue rings around its body. They are very good at blending into the color of their surroundings, which is normally a coral reef. They are usually only about 5 inches in length, but contain an impressive amount of venom. This small but deadly species of octopus is one of the most aggressive and can be a threat to humans. The common contents of their diet consist of shrimp, fish, and hermit crabs. They are threatened by animals such as whales, eels, and birds. The Blue-ringed octopus lives a quick life lasting only about a year and a half. The North Pacific Giant octopus is the largest species of octopus in the world. It can get up to lengths of 15 feet and weigh around 150 pounds once it has reached its full-grown size. Due to the fact that they reside in many different places, they can very easily change the pigmentation of their skin to blend in. They are very smart and can learn new concepts very quickly. They also are very prone to inking, if frightened because they are not as