Huge fish bait ball tries to use surfacing scuba divers as protection
5 年前
Bait balls are enormous schools of small fish, sometimes numbering in the millions. The fish cluster in huge schools as a means of protection from predators. Their shimmering scales and rapid movements make it very difficult for predators to follow and catch them. This also allows them to have many eyes to detect a threat. Each fish in the congregation is highly sensitive to panicky movements of the other fish around them and one or two of them reacting suddenly will cause an instant chain reaction. This creates a mesmerizing effect as they dart and move like one giant organism.
These scuba divers in the Galapagos Islands are surfacing from a deep dive among the hammerhead sharks and other ocean creatures. As they reached their safety stop, they were surrounded by a bait ball that drifted toward them.
These huge groups of fish are an impressive sight and fascinating to observe. They didn't understand what made the fish want to gather around humans until they realized that a a few red footed boobies were diving from above, trying to catch the fish in the bait ball.
These birds make their home on Darwin Island, which is right beside the dive site. They watch from above and bombard the schools of fish that venture close to the surface. Sometimes they do this in unison, in great numbers, increasing their chances as the fish become confused and panicky.
Red footed and blue footed boobies live in great abundance in the Galapagos Islands. They feed almost exclusively on the fish that come here for food that is brought by the ocean currents. The fish know that they are in danger of being eaten by the birds, but they may bee reluctant to swim deeper due to the schooling hammerheads. They wisely make the choice to swim near the harmless divers in the hope that the birds will be deterred. Although this works to an extent, some of the braver boobies dive bombed the fish, narrowly missing the diver with the camera.
Seeing the relationship in action between predator and prey in the ocean is an awe-inspiring experience and a reminder that in the food chain, somebody is always looking for food and somebody else is always looking for escape. For many species, this happens simultaneously.
相關影片推薦
- 2:00跟著AI賺一波~分析師推這幾檔ETF!進擊的荷包59,519 次觀看・1 週前
- 2:53寶林茶室負責人恐轉被告 欠債起底檢警疑內情不純華視影音120,530 次觀看・23 小時前
- 1:09韓女星聚餐醉到不省人事 老公被拍到「背她上車」事後甜喊:我一輩子對你好娛樂星聞80,862 次觀看・17 小時前
- 1:31穿睡衣褲上班! 中國員工「噁心穿搭」風潮|#鏡新聞鏡新聞3,621 次觀看・21 小時前
- 9:18番茄這樣做竟然這麼好吃,不用炸不用煎,加1塊豆腐,能讓你多吃兩碗飯,香!.芭樂媽的家 Qistin Wong TV61,677 次觀看・3 天前
- 1:58墨西哥逾10萬人失蹤 家屬尋親發現「祕密墳場」驚現火化爐、無名墳Yahoo奇摩(國際通)14,218 次觀看・6 小時前
- 1:17Angelababy瘋馬秀後復出 仍被踢出11年節目? 《奔跑吧》全新陣容「她」接替baby2個代言!娛樂星聞13,133 次觀看・2 天前
- 1:05王力宏被爆「出軌徐若瑄」法院判決出爐 經紀人曝動向賠償款項全捐孤兒院娛樂星聞16,311 次觀看・2 天前
- 1:46疑「米酵菌酸」釀食物中毒 米苔目老店不賣隔日貨東森新聞影音92,619 次觀看・1 天前
- 1:47日圓跳水創34年新低! 專家:美元過強 恐怕還有得貶民視影音9,813 次觀看・22 小時前