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Scuba Forum / General / December 2005Fish swarm taking shape of a larger fish?
A scuba friend says while diving in the Virgin Islands, they saw a school or swarm of small fish swimming in a formation making a distinct shape of a larger fish. Has anyone else ever observed this? PaulF > A scuba friend says while diving in the Virgin Islands, they saw a > school or swarm of small fish swimming in a formation making a > distinct shape of a larger fish. > > Has anyone else ever observed this? Yes, it's clearly shown in the film Finding Nemo. > > A scuba friend says while diving in the Virgin Islands, they saw a > > school or swarm of small fish swimming in a formation making a [quoted text clipped - 3 lines] > > Yes, it's clearly shown in the film Finding Nemo. Coffee. > A scuba friend says while diving in the Virgin Islands, they saw a > school or swarm of small fish swimming in a formation making a > distinct shape of a larger fish. > > Has anyone else ever observed this? Yes. > A scuba friend says while diving in the Virgin Islands, they saw a > school or swarm of small fish swimming in a formation making a [quoted text clipped - 3 lines] > > PaulF These fish served as comparses in "Nemo" Matthias >A scuba friend says while diving in the Virgin Islands, they saw a >school or swarm of small fish swimming in a formation making a >distinct shape of a larger fish. > >Has anyone else ever observed this? Yes I saw this whilst diving on plate coral off Zanzibar in August.  SignatureBill > A scuba friend says while diving in the Virgin Islands, they saw a > school or swarm of small fish swimming in a formation making a [quoted text clipped - 3 lines] > > PaulF There was a picture of that in one of the scuba magazines a couple of months ago- I don't remember any details except that it was taken sometime in the '50's. I try to find it when I get a free moment later. Signature"There is only one basic human right, the right to do as you damn well please. And with it comes the only basic human duty, the duty to take the consequences." -- PJ O'Rourke >>A scuba friend says while diving in the Virgin Islands, they saw a >>school or swarm of small fish swimming in a formation making a [quoted text clipped - 7 lines] > months ago- I don't remember any details except that it was taken sometime > in the '50's. I try to find it when I get a free moment later. Is tehre anything said about wether the "fish shape" was a "positive" picture, consisting of fish, or a "negative" consisting of not fish, only the surrounding edge? In latter case, the shape could as well have been caused by a large predator with a distinct sense of style. Matthias I believe that scientists have known of this phenomenon for several years now. Small fish congregating in the shape of a larger animal to discourage predators. >A scuba friend says while diving in the Virgin Islands, they saw a > school or swarm of small fish swimming in a formation making a [quoted text clipped - 3 lines] > > PaulF >I believe that scientists have known of this phenomenon for several years >now. Small fish congregating in the shape of a larger animal to discourage >predators. I believe that this is highly unlikely. Feel free to prove me wrong. Lee >>A scuba friend says while diving in the Virgin Islands, they saw a >> school or swarm of small fish swimming in a formation making a [quoted text clipped - 3 lines] >> >> PaulF >>I believe that scientists have known of this phenomenon for several years >>now. Small fish congregating in the shape of a larger animal to discourage >>predators. > >I believe that this is highly unlikely. Feel free to prove me wrong. I saw it on the Web, it must be true. >Lee > [quoted text clipped - 6 lines] >>> PaulF > Signaturedillon 666 permissions of the beast >>>I believe that scientists have known of this phenomenon for several years >>>now. Small fish congregating in the shape of a larger animal to [quoted text clipped - 4 lines] > > I saw it on the Web, it must be true. That's good enough for me. Lee >>>A scuba friend says while diving in the Virgin Islands, they saw a >>> school or swarm of small fish swimming in a formation making a [quoted text clipped - 3 lines] >>> >>> PaulF >>I believe that scientists have known of this phenomenon for several years >>now. Small fish congregating in the shape of a larger animal to [quoted text clipped - 3 lines] > > Lee Seen it with my own eyes in Palau. A shoal of small minnowy fish which were in constant rolling movement, forming a larger shape. Although this obviously doesn't look exactly like a fish, it creates the illusion of a single big 'something', moving cohesively. As a shadowy shape seen indistinctly it was very effective, even scary. When I got closer, I observed that each fish drops back to the 'tail' of the shape and then swims over the top to form part of the 'nose' again. Much like using logs to roll a big stone, taking them out at the back and placing them at the front again. Finding Nemo was very well observed. Benedict. >>>>A scuba friend says while diving in the Virgin Islands, they saw a >>>>school or swarm of small fish swimming in a formation making a [quoted text clipped - 17 lines] > single big 'something', moving cohesively. As a shadowy shape seen > indistinctly it was very effective, even scary. The reason behind is, when a predator approaches, the fish move in a way to create a void bubble in front of it's teeth. A single fish cannot duplicate this tactic. Here the predator just pursuits a targetting "trajectory", impossible with a swarm. You can observe this, standing in the reefs shallow part, seeing the swarm from above the surface. Throw a stone into the swarm's center and watch the fish vanish away from the point of impact, at the same time guarding a distinct outer shape. Matthias |
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