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Whales: Biological characteristics and environmental threats
Whales are large marine mammals categorized into two primary groups: baleen whales and toothed whales. Baleen whales, such as blue, humpback, and gray whales, use flexible plates to filter small organisms from the water. Toothed whales, including sperm whales, belugas, and orcas, use teeth to hunt prey and often employ echolocation to navigate.
As warm-blooded mammals, whales breathe air through blowholes, give birth to live young, and utilize a thick layer of blubber for insulation and energy storage. Many species undertake massive migrations, traveling thousands of kilometers between nutrient-rich feeding grounds and warmer waters for mating and calving.
While commercial hunting previously caused significant population declines, modern whale populations face ongoing threats from pollution, underwater noise, ship collisions, fishing gear, and shifting ocean ecosystems.
Entities
Claims
What the coverage asserts, and how many sources carry each claim.
- [● 3 SOURCES] Modern threats to whales include ship collisions and underwater noise. asey.gob.mx
- [● 3 SOURCES] Commercial hunting caused severe declines in many whale populations. asey.gob.mx
- [● 3 SOURCES] Adult blue whales can weigh over one hundred tonnes. asey.gob.mx
- [● 3 SOURCES] Toothed whales use echolocation to understand their surroundings. asey.gob.mx
- [● 3 SOURCES] Whales are divided into baleen whales and toothed whales. asey.gob.mx
- [● 3 SOURCES] Many whale species migrate thousands of kilometres annually. asey.gob.mx
- [● 3 SOURCES] The blue whale is the largest known animal to have ever lived. asey.gob.mx
- [● 3 SOURCES] Whales are warm-blooded mammals that breathe air through blowholes. asey.gob.mx