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SPECIES PROFILE

Humpback Whale (Megaptera novaeangliae)

Megaptera

IUCN STATUS

Least Concern

Humpback Whale (Megaptera novaeangliae) — All oceans; Alaskan feeding aggregations in the Gulf of Alaska and Southeast Alaska; winters in Hawaii, Mexico, and Central America

CONSERVATION STATUS

Least Concern

CLASS

Mammalia

GEOGRAPHICAL RANGE

All oceans; Alaskan feeding aggregations in the Gulf of Alaska and Southeast Alaska; winters in Hawaii, Mexico, and Central America

DIET

Carnivore

HABITAT

Open ocean and coastal waters; Alaskan feeding grounds in productive summer seas; winters in tropical waters for breeding

🔬 Classification

PHYLUM

Chordata

CLASS

Mammalia

ORDER

Cetacea

FAMILY

Balaenopteridae

GENUS

Megaptera

📋 Description

SIZE

12–16 m; 25,000–40,000 kg

COLORATION

Black above with white markings on the throat, belly, and flippers; knobby head (tubercles); very long flippers up to one-third of body length; flukes uniquely patterned

ADAPTATIONS

Bubble-net feeding — coordinated group hunting where whales blow a cylindrical net of bubbles to concentrate fish; spectacular lunge feeding

🌿 Ecology

HABITAT

Open ocean and coastal waters; Alaskan feeding grounds in productive summer seas; winters in tropical waters for breeding

DIET

Carnivore

GEOGRAPHIC RANGE

All oceans; Alaskan feeding aggregations in the Gulf of Alaska and Southeast Alaska; winters in Hawaii, Mexico, and Central America

REPRODUCTION

Single calf born in tropical waters after 11-month gestation; calf nursed for 6–10 months; both migrate to Alaska for summer

DIET DETAILS

Krill (euphausiids) and small schooling fish (herring, sand lance, capelin) engulfed by lunge feeding with expandable pleated throat

⚠️ Threats & Conservation

PRIMARY THREATS

Historical commercial whaling reduced global population by 90%; now recovering; ship strikes; entanglement in fishing gear; noise pollution

💡 Interesting Facts

1

Humpback Whale songs are among the most complex in the animal kingdom — males produce songs lasting up to 30 minutes that evolve culturally across populations over a single season.

2

Humpbacks are the only baleen whale species known to engage in coordinated cooperative feeding (bubble-net feeding), which requires sophisticated communication and learning.

🔭 Sighting Guide

📍 BEST PLACES TO SIGHT

Sitka Sound near Sitka, AK, has Humpback Whales feeding in productive Inside Passage waters in summer

Kenai Fjords National Park near Seward, AK, has Humpback Whales in glacially productive coastal waters

Frederick Sound near Petersburg, AK, is one of the highest-density Humpback Whale feeding aggregations in Alaska

🗓️ BEST TIME TO SIGHT

May to September: whale watching boats from Juneau, Seward, and Sitka provide close encounters with feeding and bubble-netting Humpbacks.

🎯 SIGHTING TIPS

Summer. Southeast Alaska's Inside Passage and Kenai Fjords have exceptional Humpback Whale viewing from May to September.