The Mighty Seahorse Threatened

The Mighty Seahorse Threatened

“The mighty seahorse” suggests a massive stallion galloping across the ocean’s waves. The reality is that these amazing fish range from 5⁄8 inch to 14 inches (1.5 to 35.5 cm), and they are threatened.

There are 46 identified species of seahorses, and the scientific classification is Hippocampus from the ancient Greek for ‘horse” and “sea monster.” This fish has a head like a horse and eyes that function independently and can rotate like a chameleon’s. They have a pouch like a kangaroo and a prehensile tail like a monkey. Instead of scales, their skin is covered with boney plates, spikes, and lacy skin extensions. They swim in a vertical posture using their dorsal fin for power while steering with their pectoral fins. They anchor themselves using the prehensile tail to grab onto a fixed object.

The reproductive system of the seahorse family is unlike any other group of animals. The male and female connect face to face with their tails entwining, and the female impregnates the male by depositing massive numbers of eggs in his pouch. Then, several weeks later, the males eject up to a thousand baby seahorses who will drift with the current, eventually settling down on seagrass or coral or any fixed object on the seafloor.

Seahorses eat smaller forms of sea life, including copepods, shrimp, and fish larvae. They are themselves part of the food chain eaten by larger fish. Commercial fishing operations catch 76 million seahorses a year, and human exploitation has endangered these animals.

Human understanding of all the agents of change and balance in the oceans is very limited. The role of the seahorse in the functioning of a healthy ocean has only recently become understood. The ocean system has a complex influence on life on the land. As we learn more, the complexity speaks of a design that makes chance an unlikely cause. God’s design of life on Earth is clearly seen through what has been made (Romans 1:20). The mighty seahorse is an excellent demonstration of that design.

— John N. Clayton © 2022

Reference: National Geographic, April 2022, page 72-85.

Seahorse Role Reversal

Seahorse Role Reversal

In most animal species, the female is the one who gives birth and cares for the young, but that is not always the case. One exception to that rule is the seahorse role reversal.

Females seahorses compete to secure a mate. The female is the leader in the courtship ritual, which involves an extended “dance.” After the ritual, the female will deposit her eggs in a pouch on the front of the male. The male fertilizes the eggs and keeps the embryo sea horses for as long as ten weeks.

At the end of that time, the male ejects the young with muscle contractions, pushing them out into the ocean to fend for themselves. There can be dozens or hundreds of tiny seahorses, depending on how big the male is. Sea horses live in dense seaweed, which supplies food and hides them from predators. Small fish such as seahorses are easy prey for many animals in the sea, so they need to reproduce in large numbers.

Besides the seahorse role reversal, there are other cases in the natural world where a male is the caregiver for offspring. Diversity is the answer to many needs of a balanced life system, and the male and female roles can be different depending on the needs of the ecosystem.

The more we learn of the natural world, the more examples we see of incredible design and planning which reflect God’s actions in preparing this planet for human life. We all have a role in protecting the diversity of living things God has placed in our care.

— John N. Clayton © 2020

National Wildlife magazine for December-January 2021 has pictures of seahorse birthing.