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Yes, they do have scales that are best removed before cooking.
tribulation
Yes, the Spanish mackerel has scales. These scales which only partly cover this species, are so small however that they are frequently overlooked. Many fish, such as tuna, herring and mackerel, shed their scales when removed from the water.
No, because they do not have the easily removed scales that are a requirement for fish to be kosher.
overlaping each other
This category covers establishments that prepare seafoods, including shrimpcakes, crabcakes, fishcakes, chowders, and stews in raw or cooked frozen form. Prepared fresh fish are eviscerated or processed by removal of heads, fins, and scales. This industry
The fish would dry out even if it is underwater.
Yes, smelt is a kosher species of fish as it has fins and easily removed scales.
Ratio scales and Bar scales are two scales that can determine the actual distance. Ratio scale is describes as the ratio of units in a smaller dimension. Bar scales make use of graphic lines to find the distance.
Swordfish is not Kosher. For a Fish to be Kosher it needs fins as well as scales that can be removed without ripping th skin. Swordfish do not qualify.
the animals who has scales on the body
No, sword fish is not kosher as it does not have the easily removed scales required by the laws of kashrut.