la mortandad - mortality, number of mortalities, death tollSpanish example: Hay mortandad masiva de peces por uso de insecticidas.
English example: There is a large number of fish dying because of insecticide use.
Source: la mortandad - mortality, number of mortalities, death toll (https://www.123teachme.com/spanish_feeds/word_of_the_day/2025/1/22)