History of the North Sea great herring fishing industry resulting in Scotland becoming a European leader in that industry. During the First Schleswig War (1848–51), the Crimean War (1854–56) and the Second Schleswig War (1864), belligerents took steps to reduce or eliminate commerce in the North Sea by their enemies. In the first Schleswig War, Denmark was able to halt maritime commerce by Germany in the North Sea and in the second, imposed tolls on ships crossing through the Danish straits between the Baltic and North Seas. The Crimean War saw British and French expeditions sent into the Baltic to prevent Russian ships' egress into
Pacific barracuda however, when young, Pacific barracuda are found in bays in shallow waters. However, some Pacific Barracuda have been recorded to be found in deep waters, about 37 m. The Barracuda are known to form schools and move across the ocean in these schools of fish. However, in some larger species, it has been noted that they can be found swimming solitarily. The Pacific barracuda are a predatory fish, exhibiting aggressive behavior in order to feed on other small fishes. Their diet primarily consists of small fish such as anchovies, small pacific mackerels, grunions, squid, groupers, grunts, and even young barracuda.