Simple rules for construction of a geometric nest structure by pufferfish (2018).A simulation program based on these data successfully reproduced the circle pattern, suggesting that the complex circle structure can be created by the repetition of simple actions by the pufferfish. Generally, excavation starts at lower positions, and occurs in straight lines. During construction, the pufferfish repeatedly excavates ditches from the outside in. Here, we examined the process of the outer ring construction, and extracted the ‘rules’ followed by the pufferfish. Role of Huge Geometric Circular Structures in the Reproduction of a Marine Pufferfish (2013).This is because the valleys may not contain sufficient fine sand particles for multiple reproductive cycles. Strangely enough, the males never reuse the nest, always constructing a new circular structure at the huge cost of construction. The circular structure not only influences female mate choice but also functions to gather fine sand particles in nests, which are important in female mate choice. Furthermore, they created irregular patterns in the nest comprising fine sand particles. Males dug valleys at various angles in a radial direction, constructing nests surrounded by radially aligned peaks and valleys. We report that male pufferfishes (Torquigener sp., Tetraodontidae) constructed large geometric circular structures on the seabed that played an important role in female mate choice. The following papers analyse said structures and the ethology in more depth: Puffer Fish Constructs A Masterpiece of Love - BBC Earth (YouTube).The observers believe that they serve as vital nutrients to the eggs as they hatch, and to the newborns. The little sea shells weren’t just in vain either. In fact, the scientists observed that the more ridges the circle contained, the more likely it was that the female would mate with the male. Attracted by the grooves and ridges, female puffer fish would find their way along the dark seabed to the male puffer fish where they would mate and lay eggs in the center of the circle. Why do puffer fish build sandcastles? (BBC)įurther observation revealed that this “mysterious circle” was not just there to make the ocean floor look pretty.He uses this to attract the attention of passing females. A tiny Japanese puffer fish creates a grand sand sculpture on the featureless seabed by using his fins to dig furrows.
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