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A squirt of water ..... |
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Poiseiness (sp) barbs ?? |
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A modified fin ..................... |
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When an archerfish selects its prey, it rotates its eye so that the image of the prey falls on a particular portion of the eye in the ventral temporal periphery of the retina[8] and its lips just break the surface, squirting a jet of water at its victim. It does this using the narrow groove in the roof of its mouth. It presses its tongue against this groove to form a narrow channel, then contracts its gill covers to force a powerful jet of water through the channel. The resulting jet of water can be up to 2–5 m long, but their accuracy only allows them to shoot insects 1–2 m away depending on body size. The fish can alter the power of the shot for prey of different sizes. If the first shot does not knock the victim into the water, the archerfish will keep trying. |
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I'm going to see Les Miserables in Edinburgh tomorrow night. Have any of you seen it? |
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Q7 On what would you see a gnomon? |
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Yes. I saw it at The Mayflower in Southampton several years ago. The best stage show I've ever seen. Brilliant. |
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A sundial ........ |
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It's on a sundial. |
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