Credit: SCUBAZOO/SCIENCE PHOTO LIBRARY

Caption: Bait ball of small fish being menaced by a great barracuda (Sphyraena barracuda). Fish form bait balls as an instinctive defensive measure when under pressure from predators. Small fish normally travel in large schools, as an individual fish reduces its chances of being caught when in a fast-moving highly-reflective group. Large schools attract many predators, however, including larger fish, marine mammals and sea birds. Predators attack the school from all sides, and have developed strategies to fragment schools into tight bait balls. Such bait balls are usually short-lived: the constant attacks shrink the bait ball, making it easier to catch the fish, until none of them remains. Filmed off Kei Kecil Island, Indonesia.

Release details: Model release not required. Property release not required.

Keywords: animal, animals, asia, bait ball, baitball, barracuda, behavior, behaviour, biological, biology, close-up, defence, defense, defensive, fauna, great barracuda, group, indo-pacific, indonesia, indonesian, island, islands, kei kecil, lots, maluku, many, marine, masses, moluccas, movement, multiple, nature, papua, pattern, patterns, predation, prey, protection, school, schooling, sea, seletan, shoal, shoaling, sphyraena barracuda, tropical, underwater, wildlife, zoological, zoology

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Bait ball of fish

K003/0813 Rights Managed

Downloadable master

Duration: 00:00:30

Frame size: 1920x1080

Frame rate: 25

Audio: No

Format: QuickTime, Photo JPEG 100%, progressive scan, square pixels

File size: 776.8M

Original

Capture format: HDV

Frame size: 1440x1080

Codec: HDV 1080i50

Interlaced: Yes

Please contact Science Photo Library if you require the original, or other formats.

 

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