Here are some of the reasons for this classification:
* Limited information: There is a lack of comprehensive data on their population size, distribution, and threats.
* Slow reproductive rate: Blainville's beaked whales have a long gestation period and give birth to only one calf at a time, making them particularly vulnerable to population declines.
* Bycatch: They are frequently caught as bycatch in fisheries using various gear types, particularly bottom trawling and gillnets.
* Habitat degradation and pollution: Noise pollution from shipping and other human activities can disrupt their communication and behavior. Ocean pollution can also harm their health.
* Climate change: Climate change is impacting their prey availability and habitat suitability.
The IUCN estimates that the population of Blainville's beaked whales is declining, making their conservation a significant concern.