The Gross Reason These Fish Follow Dugongs: A Deep Dive into Blue Planet III
In the latest installment of the acclaimed series Blue Planet III, viewers are treated to a fascinating yet somewhat unsettling relationship between dugongs—often referred to as “sea cows”—and the remora fish that shadow them in the ocean. As dugongs spend up to ten hours a day tirelessly grazing on seagrass, they inadvertently create a feeding frenzy for these opportunistic fish.
Dugongs are remarkable creatures, known for their gentle disposition and herbivorous diet. Their extensive munching through seagrass meadows is not only vital for their survival but also plays an essential role in maintaining the health of marine ecosystems. However, their laborious feeding habits create an unexpected scenario: as dugongs stir up sediment and uproot seagrass, they leave behind a trail of discarded scraps and detritus. This is where remoras come into play.
These small fish have developed a unique niche by hitching a ride on the backs of dugongs. Rather than expending energy to hunt, remoras capitalize on the hard work of their larger companions. As dugongs graze, remoras feast on the nutrient-rich leftovers, including invertebrates and seagrass remnants. While this behavior may seem practical from an evolutionary standpoint, it raises eyebrows due to its rather unflattering nature—illustrating yet another layer of the intricate web of marine life.
Blue Planet III continues to unveil extraordinary and often surprising relationships in the underwater world, offering viewers a glimpse into the lives of creatures that share our oceans. The exploration of these connections not only captivates audiences but also underscores the complexities of nature and the delicate balance that sustains life beneath the waves.
As the series progresses, it will undoubtedly reveal more extraordinary stories and highlight the importance of preserving these unique ecosystems. Through the lens of expert narration by David Attenborough and stunning 4K visuals, Blue Planet III promises to enlighten and inspire a deeper appreciation for the oceans and their inhabitants.
Watch the video by BBC Earth
Video “The Gross Reason These Fish Follow Dugongs | Blue Planet III | 4K | BBC Earth” was uploaded on 11/03/2026 to Youtube Channel BBC Earth