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A fish ladder, also known as a fishway, fish pass, fish steps, or fish cannon, is a structure on or around artificial and natural barriers (such as dams, locks and waterfalls) to facilitate diadromous fishes' natural migration as well as movements of potamodromous species. [ 1 ] Most fishways enable fish to pass around the barriers by swimming ...
A fish (pl.: fish or fishes) is an aquatic, anamniotic, gill-bearing vertebrate animal with swimming fins and a hard skull, but lacking limbs with digits.Fish can be grouped into the more basal jawless fish and the more common jawed fish, the latter including all living cartilaginous and bony fish, as well as the extinct placoderms and acanthodians.
Fish anatomy is the study of the form or morphology of fish. It can be contrasted with fish physiology, which is the study of how the component parts of fish function together in the living fish. [ 1 ] In practice, fish anatomy and fish physiology complement each other, the former dealing with the structure of a fish, its organs or component ...
In archeological literature, the name Boylston Street Fishweir refers to ancient fishing structures first discovered in 1913, buried 29 to 40 feet (8.8 to 12.2 m) below Boylston Street in Boston, Massachusetts. Reports written in 1942 [1] and 1949 [2] describe what was thought to be remains of one large fishweir, 2,500 years old, made of up to ...
Jessiko robot fish on France Pavilion at Yeosu 2012 World Expo. A robot fish is a type of bionic robot that has the shape and locomotion of a living fish.Most robot fish are designed to emulate living fish which use body-caudal fin (BCF) propulsion, and can be divided into three categories: single joint (SJ), multi-joint (MJ) and smart material-based "soft-body" design.
Impounds. Kennebec River. Height. 24 feet (7.3 m) Length. 917 feet (280 m) Edwards Dam was a hydroelectric dam on the Kennebec River in the U.S. state of Maine. It was located in Augusta, Maine, about 40 miles (64 km) upstream from the Atlantic Ocean. Built in 1837 of timber and concrete, it was 917 feet (280 m) long and 24 feet (7.3 m) high.
Bubble nests, also called foam nests, are created by some fish and frog species as floating masses of bubbles blown with an oral secretion, saliva bubbles, and occasionally aquatic plants. Fish that build and guard bubble nests are known as aphrophils. [1] Aphrophils include gouramis (including Betta species) and the synbranchid eel Monopterus ...
Chaenobryttus gulosus (Cuvier, 1829) Chaenobryttus coronarius (Bartram, 1791) The warmouth (Lepomis gulosus) is a freshwater fish of the sunfish family (Centrarchidae) that is found throughout the eastern United States. Other local names include molly, redeye, goggle-eye, red-eyed bream, and strawberry perch.