Any organism that exhibits cephalization is also bilaterally symmetrical given that they are often associated with one another.
Cephalization is the embryonic process by which the head of an organism is formed. Cells of all types converge towards one extreme of the embryo and produce the head region. This process is <u>extremely common among life</u> and is associated with bilateral symmetry and the <u>movement </u>of <u>cells </u>throughout the embryo.
Although "further disturbances" is pretty vague, both climate change and nonnative species will definitely have a potentially long term impact on an ecosystem