This is a tender cautionary tale as pygmy seahorses are lethal predators. Despite being the smallest seahorse species on the roster, they are ovoviviparous, meaning their eggs pause in the genital tract for some time, not emerging from the maternal body until their embryonic development is well advanced.
However, their lethal predator status is not their only characteristic; they’re known to hunt 30 to 50 times a day for sustenance. With chameleon-like eyes and a horse-like face, seahorses remain a mystery to the scientific community. Despite being iconic inhabitants of the world’s oceans, little is known about their bioluminescent capability and anatomy, but there’s no doubt about their hunting instincts.
Pygmy seahorses are among the most voracious predators on Earth. Pygmy seahorses are one of the smallest species of seahorses, roughly the size of a household paper clip—barely surpassing two centimeters. The most common species is Hippocampus bargibanti, but there are eight others. One of them, Hippocampus pontohi, was discovered in 2020. However, all are found in the region known as the Coral Triangle in Southeast Asia, including countries like the Philippines, Japan, and Indonesia.
Their preferred marine habitat is orange or purple coral reefs, where they feed on copepods, tiny crustaceans that are part of the zooplankton. Despite their diminutive size, they are some of the most lethal predators in the oceans, as asserted by Heather Koldewey, National Geographic explorer, and co-founder of Project Seahorse.
Efficient and Lethal Marine Predators
When we think of ‘marine predators’, sharks and orcas might come to mind. However, pygmy seahorses seem to be incredibly precise when it comes to hunting and providing food for their families. Despite their small size, according to marine life specialists, pygmy seahorses have an almost insatiable hunger. On a normal day, they feed 30 to 50 times. Their suction mechanism is so powerful that it allows them to consume fish larvae or tiny shrimp.
Throughout the day, they suck seawater to catch their prey, which often number in the hundreds. While their hunting days don’t leave blood trails, this is why they are some of the most efficient predators in the oceans. Since the larvae and microscopic animals they feed on can’t see them or mistake them for corals and rocks in the sea, pygmy seahorses take advantage of this situation to eat more and better. Hence, although some of them are small, they are highly lethal.
Their Astonishing Ability to Camouflage
Being such a tiny creature coexisting with large predators in the vastness of the sea, the pygmy seahorse has developed an incredible ability to camouflage. This allows it to go unnoticed and survive. How does it do it? By adapting its color to match the coral where it will spend its entire adult life. This was only recently discovered thanks to researchers at the University of California; previously, it was thought that they chose coral based on their color.
Scientists observed that certain newly hatched pygmy seahorses, brown in color, acquired the color of the nearby coral. Additionally, they developed small bumps that helped them perfectly mimic the texture of the coral.
This story was written in Spanish by Perla Vallejo in Ecoosfera.