Appearance
L. oceanica is oval, twice as long as broad, and may reach up to 30 mm in length, making it one of the largest oniscid isopods. It has large compound eyes and long antennae, two-thirds as long as its body. Its colour may vary from grey to olive green, and can be changed by the animal (using melanophores) for camouflage on different backgrounds or for thermal regulation (paler to cool down, darker to heat up).
Habitat
"L. oceanica" is found in temperate waters from Norway to the Mediterranean Sea, and from Cape Cod north to Maine. It is a common species, occurring wherever the substrate of the littoral zone is rocky, and is especially common in crevices and rock pools and under stones. It is a nocturnal omnivore, eating many kinds of seaweed, diatoms, and detritus, with a particular fondness for bladder wrack.References:
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