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The octopus is a soft-bodied, eight-armed mollusc of the order Octopoda. Around 300 species are recognised and the order is grouped within the class Cephalopoda with squids, cuttlefish and nautiloids. Like other cephalopods, the octopus is bilaterally symmetric with two eyes and a beak, with its mouth at the centre point of the arms (which are sometimes mistakenly called “tentacles”). The soft body can rapidly alter its shape, enabling octopuses to squeeze through small gaps. They trail their eight arms behind them as they swim. The siphon is used both for respiration and for locomotion, by expelling a jet of water. Octopuses have a complex nervous system and excellent sight, and are among the most intelligent and behaviourally diverse of all invertebrates.
Octopuses inhabit various regions of the ocean, including coral reefs, pelagic waters, and the seabed; some live in the intertidal zone and others at abyssal depths. Most species grow fast, mature early and are short-lived. During breeding, the male uses a specially adapted arm to deliver a bundle of sperm directly into the female’s mantle cavity, after which he becomes senescent and dies. The female deposits fertilised eggs in a den and cares for them until they hatch, after which she also dies.
Advantages of Octopus PNG Format
- Higher bit depths (more colors) PNG allows for 1, 2, 4, 8, 16, 24 and 32 bit images, smashing the 8-bit barrier
- A permanent, royalty-free license PNG is being developed by the W3C, and will always be a free and open standard
- Multiple layers of transparency Octopus PNG images allow for full alpha channel transparency, which makes moving images from one background to another easy.
- Uses a lossless image compression technique, hence no information is lost and the image is retrieved keeping the same quality.
- Supports all the true colors, unlike the contemporary GIF format which only supports 256 colors.
- Alpha channel support in PNG images allows transparency of the file format which is not possible with other file formats.