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Atlantic puffin with fish. Like many auks, puffins eat both fish and zooplankton but feed their chicks primarily with small marine fish several times a day. The puffins are distinct in their ability to hold several (sometimes over a dozen) small fish at a time, crosswise in their bill, rather than regurgitating swallowed fish.
When oiled birds get washed up on beaches around Atlantic coasts, only about 1.5% of the dead auks are puffins, but many others may have died far from land and sunk. [54] After the oil tanker Torrey Canyon shipwreck and oil spill in 1967, few dead puffins were recovered, but the number of puffins breeding in France the following year was ...
Tufted puffins are around 35 cm (14 in) in length with a similar wingspan and weigh about three-quarters of a kilogram (1.6 lbs), making them the largest of all the puffins. Birds from the western Pacific population are somewhat larger than those from the eastern Pacific, and male birds tend to be slightly larger than females.
The chicks have a less varied diet, feeding mainly on sandeel or capelin from near the coast. These fish are distributed by the parents two to six times per day. [18] Unlike many other seabirds, which employ regurgitation to feed their young, horned puffins feed their chicks whole fish directly from the bill. [27]
The fish range in size from about 3.83 inches to about 4.86 inches long, the study said. They were collected from between approximately 630 feet underwater to about 985 feet underwater.
Sand eel or sandeel is the common name used for a considerable number of species of fish. While they are not true eels, they are eel-like in their appearance and can grow up to 30 cm (12 in) in length. [1] Many species are found off the western coasts of Europe from Spain to Scotland, and in the Mediterranean and Baltic Seas.
Some fish like carp and zebrafish have pharyngeal teeth only. [30] [31] Sea horses, pipefish, and adult sturgeon have no teeth of any type. In fish, Hox gene expression regulates mechanisms for tooth initiation. [32] [33] While both sharks and bony fish continuously produce new teeth throughout their lives, they do so via different mechanism.
The mouth cone ("everted pharynx") of a possible new species of Meiopriapulus, a marine worm in the Priapulida, bears pharyngeal teeth. [5] Fossils of the Yunnanozoon and Haikouella possess pharyngeal teeth. The lower pharyngeal bones of cichlids also carry specialized teeth which augment their normal mandibular teeth in the breakdown of food.