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As generally benthic fish, blenniiformids spend much of their time on or near the sea floor; many are reclusive and may burrow in sandy substrates or inhabit crevices in reefs, the lower stretches of rivers, or even empty mollusc shells. Some blennies, otherwise known as "rock-hoppers", leap from the water onto rocks in order to reach other pools.
Monobromotoluene isomers [1] [2] [3]; Common name Structure Systematic name: 1-bromo-2-methylbenzene 1-bromo-3-methylbenzene 1-bromo-4-methylbenzene Molecular formula
Benzyl bromide is used in organic synthesis for the introduction of the benzyl groups when the less expensive benzyl chloride is insufficiently reactive. [6] [7] Benzylations are often achieved in the presence of catalytic amounts of sodium iodide, which generates the more reactive benzyl iodide in situ. [3]
In fish, the long bony cover for the gill (the operculum) can be used for pushing water. Some fish pump water using the operculum. Without an operculum, other methods, such as ram ventilation, are required. Some species of sharks use this system. When they swim, water flows into the mouth and across the gills.
Examples of simple benzene derivatives are phenol, toluene, and aniline, abbreviated PhOH, PhMe, and PhNH 2, respectively. Linking benzene rings gives biphenyl , C 6 H 5 –C 6 H 5 . Further loss of hydrogen gives "fused" aromatic hydrocarbons, such as naphthalene , anthracene , phenanthrene , and pyrene .
An example would be a vertebrate with an alcohol-preserved skin and viscera, a cleared and stained head, the post-cranial dried skeleton, histological, glass slides of various organs, and frozen tissue samples. This specimen could also be a voucher for a publication, or photographs and audiotape.
Psychrolutes marcidus, the smooth-head blobfish, [1] also known simply as blobfish, [1] is a deep-sea fish of the family Psychrolutidae. It inhabits the deep waters off the coasts of mainland Australia and Tasmania, as well as the waters of New Zealand. [2] Blobfish are typically shorter than 30 cm (12 in).
Brycon is a genus of fish in the family Bryconidae and order Characiformes found in freshwater habitats in Central and South America, ranging from southern Mexico to northern Argentina. [1] Despite not being closely related to true trout , they are sometimes called South American trout. [ 2 ]