By attaching themselves to whales, who regularly travel to areas with plenty of food to eat, the barnacles have unlimited access to food. Most barnacles attach themselves on the whale’s head so that they can easily filter the food that the whale spills out of its mouth as it eats. They are guaranteed plenty of fresh food and water in this prime location.
So what’s the takeaway here? As fascinating as it is that barnacles can survive on the skin of such massive creatures, we ultimately need to reduce the harm that this imparts onto their hosts. By better understanding the complexities behind these seemingly insignificant relationships in our oceans, we can work towards protecting and preserving the health of all marine species – especially those as majestic as whales.
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Here's an age-old question: why don't whales give barnacles the boot? It's normal to think these crusty stowaways might be a nuisance, but the reality is a bit more complex.
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There’s plenty of space to squat on a whale, but barnacles are picky. They like spots where the flow of water is consistent, Zardus explained, like the head or the fins. So instead of settling wherever they land, the larvae use their front antennae to “walk” around the whale in search of prime real estate. And that’s no easy stroll: if a barnacle larva were the size of a person, a whale would be over 20 miles long. Luckily, the larvae produce a sticky cement that keeps them from falling off into the ocean during their trek.
A
Look at Lice
Whale lice are another type of whale hitchhiker. Unlike barnacles, lice
are true parasites. They feed on gray whale skin and damaged tissue. The
lice gather around open wounds or scars. See Photo.
Whale lice may spread from mother
whales to their calves during birth, nursing, or other bodily contact.
Up to 1000 of these parasites have been found on a single gray whale.
Luckily for the lice-infested whales, other creatures go after the lice.
Topsmelt are silvery fish that school in the breeding lagoons. Normally
they feed on marine plants, tiny shrimps and other miniscule creatures
of the lagoons. But when the whales are around, the topsmelt dine on the
whales. How? Schools of these small fish pick at the barnacles and whale
lice crusting up a whale's skin. Topsmelt groom whales in the calving
lagoons. By ridding the whales of some of their parasites and old, flaky
skin, topsmelt may be helping to cut down the resistance, or drag, that
grays create as their huge bodies move through the water. The whales have
a smoother ride and the topsmelt groomers get protein-rich food.
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