Sperm Whales at Sunset in the Islands

Sperm Whales

Sperm whales (Physeter macrocephalus) are the largest members of the toothed whales (odontoceti), unique in their shape by having conspicuously large heads, containing a milky white substance called spermaceti (early whalers incorrectly believed this substance to be sperm, hence their name). Spermaceti (literally “whale-sperm”) is a waxy substance formally used in cosmetics, the perfume industry, as a lubricant, among other uses. Years later, the oil of the jojoba plant proved to be equally efficient as an alternative to slaughtering whales.

These whales grow to enormous proportions, with males reported to exceed 20 meters of length (67 feet) reaching impressive weights of over 50 tonnes. Females may score nearly half of the male’s proportions. At birth, sperm whales measure 4 metres/1 tonnes!

Galapagos Sperm Whales
A Mother Sperm Whale And Her Calf. Photo By: Gabriel Barathieu Via Wikipedia Commons

They also possess the largest and heaviest of all brains in nature.

The behavior observed is often referred to as “logging”. This is floating at the surface of the sea, believed to be time for resting and socialization. When sperm whales forage for food (mostly giant squid) they may go to extreme depths of over 2000 meters for well over one hour each dive!

Sperm Whales have been actively hunted for centuries in the Galapagos Islands, especially in the early 19thcentury, until their numbers reduced significantly towards the 1860s, making the long journey to Galapagos no longer profitable. Sperm whales continued to be hunted in the Pacific until the 1980s. Even after hunting had stopped, the global population of these cetaceans has not shown signs of recovery, and sightings have become less common. Researchers believe the pods may have moved to other feeding grounds along with the Pacific Oceans. This comeback of sperm whales is celebrated among naturalists and researchers, it’s also an achievement that proves that sustainable travel is key in maintaining the archipelago’s ecosystem.

Updated:May 5, 2023

Published:September 28, 2015


Machu Picchu & Galapagos Islands Tour 2024 Package: 12 days / Quito, Galapagos Islands and Machu Picchu / From USD 9,598 per person



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A Font of information, Klaus has spent decades in the field, leading tours in the Amazon, Andes and Galapagos Islands. He hung up his guiding boots a few years back and now creates itineraries for the tour operator, Metropolitan Touring. Adrift in the Pacific Ocean, hundreds of miles from mainland South America, Galapagos is one of the most biodiverse locales on Earth.

Cruise Critic

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Terms and Conditions

Itinerario de 5 días / 4 noches: Basado en la tarifa regular (4214 USD + impuestos por persona)
Itinerario de 7 días / 6 noches: Basado en la tarifa regular (5672 USD + impuestos por persona)
No reembolsable. Aplica únicamente para residentes ecuatorianos en nuevas reservas directas realizadas, hasta el 30 de junio del 2022, con un ejecutivo de ventas del hotel. Válido para estadías hasta el 31 de agosto de 2022. No puede ser combinada con otros descuentos, promociones u ofertas. El descuento no aplica para otros servicios. El precio no incluye recargo de combustible de $20 por noche de crucero.

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