The bycatch of the Caspian seal may be recognized as the one of the biggest entanglements of pinnipeds as bycatch in the world   Of the 21 albatross species recognised by IUCN on their Red List, 19 are threatened, and the other two are "near threatened". Two species are considered critically endangered: the Amsterdam albatross and the Chatham albatross. One of the main threats is commercial long-line fishing, because the albatrosses and other seabirds which readily feed on offal are attracted to the set bait, after which they become hooked on the lines and drown. An estimated 100,000 albatross per year are killed in this fashion. Unregulated pirate fisheries exacerbate the problem. Sea turtles, already critically endangered, have been killed in large numbers in shrimp trawl nets. Estimates indicate that thousands of Kemp's ridley, loggerhead, green and leatherback sea turtles are caught in shrimp trawl fisheries in the Gulf of Mexico and the US Atlantic annually The speed and length of the trawl method is significant because, “for a tow duration of less than 10 minutes, the mortality rate for sea turtles is less than one percent, whereas for tows greater than sixty minutes the mortality rate rapidly increases to fifty to one hundred percent”  Sea turtles can sometimes escape from the trawls. In the Gulf of Mexico, the Kemp’s ridley turtles recorded most interactions, followed in order by loggerhead, green, and leatherback sea turtles. In the US Atlantic, the interactions were greatest for loggerheads, followed in order by Kemp’s ridley, leatherback, and green sea turtles. Bycatch is inevitable where there is fishing activities. The incidental catch is not limited to only fish species: dolphins, sea turtles, and seabirds are also victims of bycatch. Longlines, trawls and purse seine nets are driving factors in the endangerment of no fewer than fifteen shark species. Bycatch may also affect reproduction of populations as juveniles are also victims of bycatch. Bycatch happens most commonly with the use of gillnets, longlines, or bottom trawls. Longlines with bait hook attachments can potentially reach lengths of dozens of miles, and, along with gill nets in the water and bottom trawls sweeping the sea floor, can catch essentially everything that swims by and which is in their paths. Currently in the world, there are thousands of miles of different types of nets and lines being put into world’s ocean daily, and these modern fish gear are robust and invisible to the eye, making them efficient at catching fish and bycatching everything else that comes in the way.