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A fish doorbell (Dutch: visdeurbel) is a system that allows fish to pass through a closed sluice gate through crowdsourced input when fish are present. The Utrecht Visdeurbel uses a livestreamed underwater camera that allows users to press a doorbell button to notify the lock operator that there are fish swimming in the gracht, and that the lock should be opened. [1]
Netscape has a web feed of their fish tank, and for some time had an easter egg hidden in Netscape Communicator that would bring that page up when a user pressed CTRL + ALT + F. [5] [6] [7] The Netscape Fishcam was the 2nd live camera to start broadcasting on the Web.
By attracting fish into the field of view of a remotely controlled camera, the technique records fish diversity, abundance and behaviour of species. Sites are sampled by video recording the region surrounding a baited canister which is lowered to the bottom from a surface vessel or less commonly by a submersible or remotely operated underwater ...
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The Wadden Sea stretches from Den Helder, in the northwest of the Netherlands, past the great river estuaries of Germany to its northern boundary at Skallingen in Denmark along a total coastline of some 500 km (310 mi) and a total area of about 10,000 km 2 (3,900 sq mi). Within the Netherlands, it is bounded from the IJsselmeer by the Afsluitdijk.
The creature dates back to prehistoric times. For premium support please call: 800-290-4726 more ways to reach us
In the seagrass beds, one can find a nursery for reef fish and a foraging ground for endangered queen conch and green turtles as well. [2] They are important for the egg-laying and rearing of the young for many species of fish. In addition, large populations of marine snails, such as beautiful flamingo tongue snails (Cyphoma gibbosum), live ...
The Netherlands, [k] informally Holland, is a country in Northwestern Europe, ... though dishes near the coastal regions include a large amount of fish.