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The Sawfish, a ray, is an Elasmobranch and like its fellow group members (sharks, rays and skates) has a cartilaginous skeleton. It uses its saw (characterized by toothlike structures called denticles) for defense and for feeding by slashing its saw from side to side along the ocean floor, dislodging prey and likely by slashing through schools of fish, stunning or injuring them before consuming them via the ventral mouth. The largest species has been documented to weigh in at over 5,000lbs. S...
The Ocean is a Garbage Can ... Verrier's eye-catching rendering depicts objects bobbing in an ocean. The graphic correlates depth to the number collected since the first Coastal Cleanup day in 1986. In an instant, it's easy to see how difficult it is for marine life to survive in that much detritus.
Most plastic pollution at sea starts out on land as litter on beaches, streets and sidewalks. After plastics enter the marine environment they slowly photodegrade into smaller pieces that marine life can mistake for food, sometimes with fatal results. Ocean gyres concentrate plastic pollution in five main areas of the world’s ocean and various research groups are bringing back alarming data documenting plastics impacts.
Diatoms are photosynthetic plankton (microscopic algae) ubiquitous in oceans and freshwater systems. They are a major source of nutrients for marine organisms as well as a major producer of oxygen. They have been dubbed the “lungs of the ocean,” producing about 20 % of the oxygen we breathe–as much as all the rainforests combined.