They are found in marine ecosystems all over the planet, including the open ocean, tide pools, polar waters, marine caves, coastal lagoons, and the deep sea.
(They; are found; L:in marine ecosystems all over the planet, including the open ocean, tide pools, polar waters, marine caves, coastal lagoons, and the deep sea)
They
are found
L:in marine ecosystems all over the planet, including the open ocean, tide pools, polar waters, marine caves, coastal lagoons, and the deep sea