Mandatory Nursing Competencies & Information Packets. Please review the following Self Learning Packets and complete the corresponding post-tests. Make sure to click below the final question in the test so it is graded correctly at the bottom of the screen. Many of the tests are short but require a grade of 100% to qualify as passing.
Stingray Giant Freshwater. Stingray, Giant Freshwater (Himantura Chaophraya) The Giant Freshwater Stingray in Thailand is believed to be the largest freshwater fish on the planet reaching weights approaching 1000 lbs.
The 'stinger' actually is a barbed spine that is located at the base of the stingray's tail. The barb contains a venom and is the stingray's defensive weapon. It does not use the barb on prey. Stingrays spend a lot of time swimming just over the surface of sandy bottoms, looking for food. When they feed, and sometimes when they rest, they settle onto the bottom and lie flat. Thus, whether resting or hunting, they are subject to predation from above.