Freshwater stingray | 水產百科網
FreshwaterstingraysliveintheAmazonRiversystemandareoneoftheonlyraysinhabitingfreshwaterratherthansaltwater.Thoughdocileanimals,theyare ...
These flattened fishes have eyes on the top of their bodies with mouths and gill slits on their undersides. Directly behind the eyes are spiracles, which are openings that allow for respiration. Their tails are typically longer than their disc width and usually have one or more long, saw-like spines behind the pelvic fin. Used for self-defense, the stinger is tipped with barbs that can rip through flesh when withdrawn. Each spine has grooves underneath that contain protein-based venom. The spines are constantly being shed and replaced, allowing the stingray to sometimes have two stingers as a new stinger grows in to replace the older one. Most South American species have colorful dorsal patterns that feature spots of different sizes and background colorings of gray, brown or black.
Amazon.com | 水產百科網
Freshwater stingray | 水產百科網
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【滿天星黑白魟Potamotrygon henlei】河魟科
水產分類:台灣常見的大陸水產品圖說中文名稱:滿天星黑白魟學名:Potamotrygonhenlei科別名稱:河魟科命名學者:(Castelnau1855)