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Rhizostoma pulmo, also known as the barrell jellyfish. (Photo credit: Rai Fernandez)

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.

White Sturgeon, Fraser River area. The largest freshwater fish in North America. Can grow up to six meters in length, weigh over 600 kilograms, and live over 150 years.