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Fish: Dorsal view of right-bending (left) and left-bending (right) jaw morphs [4]. Many flatfish, such as flounders, have eyes placed asymmetrically in the adult fish.The fish has the usual symmetrical body structure when it is young, but as it matures and moves to living close to the sea bed, the fish lies on its side, and the head twists so that both eyes are on the top.
Biosonar by cetaceans River dolphins have very small eyes. The ears of river dolphins have specific adaptations to their aquatic environment. In humans, the middle ear works as an impedance equalizer between the outside air's low impedance and the cochlear fluid's high impedance. In river dolphins, and other cetaceans, there is no great ...
The evolution of the mammalian middle ear appears to have occurred in two steps. A partial middle ear formed by the departure of postdentary bones from the dentary, and happened independently in the ancestors of monotremes and therians. The second step was the transition to a definite mammalian middle ear, and evolved independently at least ...
The cetacean ear has specific adaptations to the marine ... Dolphins tend to travel in pods, sometimes of up to 600 members. ... 135 A coda is a short pattern of 3 to ...
A striped dolphin leaps in the Mediterranean Sea off Toulon. The striped dolphin has a similar size and shape to several other dolphins that inhabit the same waters (see pantropical spotted dolphin, Atlantic spotted dolphin, Clymene dolphin]]). However, its colouring is very different and makes it relatively easy to notice at sea.
These patterns in the ear's frequency responses are highly individual, depending on the shape and size of the outer ear. If sound is presented through headphones, and has been recorded via another head with different-shaped outer ear surfaces, the directional patterns differ from the listener's own, and problems will appear when trying to ...
The dolphin ear is acoustically isolated from the skull by air-filled sinus pockets, which allow for greater directional hearing underwater. [18] Dolphins send out high frequency clicks from an organ known as a melon. This melon consists of fat, and the skull of any such creature containing a melon will have a large depression.
The rough-toothed dolphin (Steno bredanensis) is a species of dolphin that can be found in deep warm and tropical waters around the world. The species was first described by Georges Cuvier in 1823. The genus name Steno , of which this species is the only member , comes from the Greek for 'narrow', referring to the animal's beak — which is a ...