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Octopuses have 2 eyes and 4 pairs of arms and are bilaterally symmetric. An octopus has a hard beak, with its mouth at the center point of the arms. Octopus lack an internal or external skeleton allowing them to squeeze through tight places. Octopuses are among the most intelligent and behaviorally flexible of all invertebrates.

Jellyfish by Joseph Jackino. Beautiful painting!

The north ends of white jellyfish going south in the deepest, blackest depths.

HandFish, a cousin to the angler fish. Brachionichthys politus from Tasmania. They 'walk' rather than swim, using their modified pectoral fins to move about on the sea floor.