Editing Bycatch (section)

===Cetacean===
{{main|Cetacean bycatch}}
[[File:Fraser s group.jpg.jpeg|thumb|left|Group of [[Cetacean bycatch#Spinner and Fraser's dolphins|Fraser's dolphins]]]]
[[Cetacean]]s, such as [[dolphin]]s, [[porpoise]]s, and [[whale]]s, can be seriously affected by entanglement in [[fishing net]]s and [[fishing line|lines]], or direct capture by [[Fish hook|hooks]] or in [[Trawling|trawl nets]]. Cetacean bycatch is increasing in intensity and frequency.<ref name="Demaster (2001)">{{cite journal
|last1=Demaster |first1=DJ |last2=Fowler |first2=CW |last3=Perry |first3=SL |first4=ME |last4=Richlen 
|year=2001
|title=Predation and competition: the impact of fisheries on marine mammal populations over the next one hundred years
|journal=Journal of Mammalogy
|volume=82
|issue=3
|pages=641–651 |doi=10.1644/1545-1542(2001)082<0641:PACTIO>2.0.CO;2
|doi-access=free }}</ref> In some fisheries, cetaceans are captured as bycatch but then retained because of their value as [[Whale meat|food]] or [[Bait fish|bait]].<ref name="Read (2006)">{{cite journal |vauthors=Read AJ, Drinker P, Northridge S |year=2006 |title=Bycatch of marine mammals in the U.S. and global fisheries |journal=[[Conservation Biology (journal)|Conservation Biology]] |volume=20 |issue=1 |pages=163–169 |pmid=16909669 |doi=10.1111/j.1523-1739.2006.00338.x|bibcode=2006ConBi..20..163R |s2cid=157350 }}</ref> In this fashion, cetaceans can become a target of fisheries.

[[File:Entangled porpoise.jpg|right|thumb|A [[Dall's porpoise]] caught in a fishing net]]
One example of bycatch is dolphins caught in [[tuna]] nets. As dolphins are [[mammal]]s and do not have [[gill]]s, they may drown while stuck in nets underwater. This bycatch issue has been one of the reasons of the growing [[ecolabel]]ling industry, where fish producers mark their packagings with disclaimers such as "dolphin friendly" to reassure buyers. However, "dolphin friendly" does not mean that dolphins were not killed in the production of a particular tin of tuna, but that the fleet which caught the tuna did not ''specifically'' target a feeding [[Dolphin#Social behavior|pod]] of dolphins, but relied on other methods to spot tuna schools.{{citation needed|date=April 2009}}
The bycatch of the [[Caspian seal]] may be recognized as one of the biggest entanglements of pinnipeds as bycatch in the world <ref>{{cite journal |doi=10.1371/journal.pone.0067074|pmid=23840590|pmc=3694144|title=Assessment of Caspian Seal By-Catch in an Illegal Fishery Using an Interview-Based Approach|journal=PLOS ONE|volume=8|issue=6|pages=e67074|year=2013|last1=Dmitrieva|first1=Lilia|last2=Kondakov|first2=Andrey A.|last3=Oleynikov|first3=Eugeny|last4=Kydyrmanov|first4=Aidyn|last5=Karamendin|first5=Kobey|last6=Kasimbekov|first6=Yesbol|last7=Baimukanov|first7=Mirgaliy|last8=Wilson|first8=Susan|last9=Goodman|first9=Simon J.|bibcode=2013PLoSO...867074D|doi-access=free}}</ref><ref>{{cite journal |doi=10.1016/j.marpol.2017.09.022|title=Assessment of the sturgeon catches and seal bycatches in an IUU fishery in the Caspian Sea|journal=Marine Policy|volume=87|pages=284–290|year=2018|last1=Ermolin|first1=Ilya|last2=Svolkinas|first2=Linas|url=http://eprints.whiterose.ac.uk/124584/5/Assessment%20of%20IUU%20catches%20after%20revision.pdf}}</ref>