Researchers have reported that the number of different species of fish found in certain areas of the ocean has been greatly reduced over the past 50 years. give a reason, other than overfishing, that may be the cause of this decline.

the dark variety, as they are not visible on the dark tree barks

explanation:

thrombocytopenia, which is a deficiency in blood platelets, can cause bleeding and bruising in the dermis similar to senile purpura. other possible causes include: exposure to ultraviolet rays and aging skin are common causes of senile purpura. senile purpura may also be a sign of collagen loss in the skin and bones.