Octopus

 

True Wild Life | Octopus | The octopus group makes up around a third of the worlds cephalopod population, with around 300 species found in waters around the world. The octopus can be found in the all the worlds oceans, with the octopus ranging in size from a just few centimeters to number of feet depending on the species of octopus! The octopus often has a sharp beak, and an octopus will always have eight arms (unless any have been lost). Most species of octopus generally have arms with circular sucker pads on.

The lifespan of the octopus depends on the species of octopus, with many species of octopus averaging around 6 months old. Some species of octopus however, particularly the bigger octopus species, can live for a few years. The octopus is well known for being a master of disguise and is able to blend into pretty much any background using its elaborate camouflage. The octopus not only uses this to its advantage for both hiding from potential prey and predators, but it is also thought to play a role in the male octopuses mating display, in order to attract a female octopus.

The octopus is also thought to have three hearts, two of which are used for pumping blood through the gills, and another for pumping the pale blue blood of the octopus through the rest of the body.

Generally, most species of octopus have no internal or external skeleton which means that the octopus is able to squeeze itself into tight places. The octopus is known to be one of the most intelligent of all the invertebrates and the octopus uses this to its advantage mainly using elaborate disguise.

Millipede

True Wild Life | Millipede | The millipede is a medium to large sized invertebrate that is found under rocks and in decaying logs all around the world. The millipede has a long and narrow body which is made up of segments. The millipede is from the same family as the centipede, but the millipede generally has more legs for it's body length than the centipede. The average millipede has between 80 and 400 legs, not a thousand as the name suggests.

The millipede is found all over the world but is more common in the southern hemisphere where the millipede has been known to get to nearly 40cm long. Some species of millipede have a poisonous bite which they use to kill their prey before eating it. Millipedes are most commonly found in the cooler, damper and darker places within their environment. Millipedes inhabit areas under rocks, in the leaf litter, in rotting logs and occasionally in burrows which are all known as micro-habitats.

The exact number of legs and segments that make up the body of the millipede, depend on the millipede species. However, all millipedes are made up in a similar way with the first sections of the millipede's body having one pair of legs and the later sections of two pairs of legs. The legs of millipede all work together and move in a wave-like motion. The millipede is an omnivorous animal but primarily feeds on dead plant material and decaying matter on the forest floor. Millipedes are also known to eat some species of plants (that are alive0) and the larger species of millipede also hunt insects.

The millipede has a number of different predators in it's natural environment including birds, badgers, foxes and small rodents such as shrews and rats. When the millipede feels that it is in danger it curls up into a spiral and some species of millipede even release a disgusting smelling liquid that deters many of the animals that prey on the millipede. The female millipede can lay up to 1,000 sticky eggs at once although the number of millipede eggs laid is usually closer to 500. When the baby millipedes hatch they only have 3 pairs of legs but they shed their skin as they grow. Each time the baby millipedes shed their skin they develop more body segments and legs.

Horseshoe Crab

True Wild Life | Horseshoe Crab | The horseshoe crab (also known as the king crab), is a hard-shelled invertebrate found on the sea floor in warmer climates. Despite it's name, the horseshoe crab is not actually a crab (or crustacean) and is in fact more closely related to arachnids such as spiders and scorpions. There are four different species of horseshoe crab found inhabiting the warmer shallows off the coasts of India, Japan, Indonesia, the eastern USA, and the Gulf of Mexico.

The horseshoe crab has a hard outer shell, five pairs of legs and a long, thin tail which the horseshoe crab uses for changing direction whilst swimming rather than as a defensive weapon. The appearance of the horseshoe crab is thought to have changed very little from when it first evolved around 500 million years ago. Horseshoe crabs breathe using book gills, which are thin plates found on the abdomen of the horseshoe crab.

Horseshoe crabs are generally nocturnal animals, coming out of the shadows in the darkness in order to hunt for food. As carnivorous animals, horseshoe crabs only eat meat including sea worms, small molluscs and crustaceans. Thanks to their armoured casing, horseshoe crabs have few natural predators and are primarily hunted by sharks and sea turtles. Humans also widely hunt the horseshoe crab around the world, along with coastal birds that pick the horseshoe crabs out of the shallows.

Female horseshoe crabs are known to lay between 60,000 to 120,000 eggs at a time. After mating, the female horseshoe crab lays her eggs into a hole in the sand which she then covers up to protect them. Today, the horseshoe crab is still found widely along the world's warmer coastlines although horseshoe crab populations in certain areas are suffering from high levels of water pollution and over-fishing.