The common Atlantic octopus can grow up to three meters long. They have two rows of suckers on their tentacles, which can grow up to four times the length of their bodies. They are mainly found in tropical waters in eastern Atlantic areas between 1 and 200 meters deep. These octopi represent one of the most populous species, and they are often caught by fisherman as food.
Whereas the typical ratio of an octopus' tentacle to body length is about 4-to-1, the Atlantic longarm octopus ratio is 7-to-1. Their bodies grow up to 1 meter long and are often found around Australia, Malta and the Florida Keys. Although they have bright white spots over their bodies, they are capable of changing colors when in danger.
Unlike other Atlantic octopi, the Caribbean reef octopus is a solitary animal that prefers to eat and live without the presence of other octopi. They are significantly smaller than other species, measuring up to 12 centimeters with a tentacle span of 60 centimeters. They are commonly found in the Western Atlantic, Bahamas, Caribbean and off the coast of South America. They feed on small fish and bivalves by trapping them in a large net-like structure that they form with their tentacles.
The Caribbean Armstripe has a brown stripe on its tentacles, and it is usually found in the region between the U.S. and Brazil and also in parts of West Africa. These octopi are generally found in sandy banks and muddy bottoms where they can burrow and hide from predators. They grow up to 8 centimeters with tentacles as long as 16 centimeters. During the mating process, the male octopus's tentacle turns into a sexual organ to assist in insemination.