Fishes are not the only ones caught and killed when fishing. Nets, hooks, and traps catch any animals unlucky enough to be in their path. Bycatch consists of non-target animals who are caught and usually thrown back into the sea, dead or dying. It’s estimated that due to the American consumption of seafood, there are 14 to 32 billion animals caught as bycatch a year. Some estimates say eight percent of total catch is bycatch.
Lost and abandoned fishing gear continues to catch, injure, and kill animals for years.
Discards in the World’s Marine Fisheries: An Update by K. Kelleher, FAO Fisheries Technical Paper #470 (2005).
Worse things happen at sea: the welfare of wild-caught fish by Alison Mood, fishcount.org.uk, (2010).
How many animals does a vegetarian save? by Harish Sethu, Counting Animals (2015).