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Journal of Aquaculture Engineering and Fisheries Research

Opinion - (2024) Volume 10, Issue 1

A portable underwater stereo vision device for fish measurement
Duo Li*
Department of Food Science and Nutrition, University of Zhejiang, China
*Correspondence: Duo Li, Department of Food Science and Nutrition, University of Zhejiang, China, Email:

Received: Jan 01, 2024, Manuscript No. JAEFR-24-126352; Editor assigned: Jan 03, 2024, Pre QC No. JAEFR-24-126352 (PQ); Reviewed: Jan 17, 2024, QC No. JAEFR-24-126352; Revised: Jan 22, 2024, Manuscript No. JAEFR-24-126352 (R); Published: Jan 29, 2024, DOI: 10.3153/JAEFR.10.01.07

Citation: Li D. A portable underwater stereo vision device for fish measurement. J Aquacult Eng Fish Res. 2024; 10(1)


Fish fins, the primary appendages that facilitate aquatic locomotion and manoeuvrability, are marvels of evolutionary adaptation. However, despite their efficiency in propelling fish through water, fins come with their own set of drawbacks and limitations. This comprehensive exploration delves into the intricacies of fish fins, discussing their evolution, diverse functions, and the drawbacks that fish encounter in their underwater realm. Fish fins have evolved over millions of years, adapting to various aquatic environments and lifestyles. From the early fins of ancient fish to the specialized structures in modern species, fins showcase remarkable diversity in form and function. These fins, located on either side of a fish's body, provide stability and control during swimming. While essential for manoeuvring, pectoral fins can become a drawback in confined spaces, hindering agile movements. Positioned along the fish's back, dorsal fins contribute to stability and prevent rolling. In some cases, overly large dorsal fins may increase drag, impeding speed and efficiency. The anal and caudal fins are critical for propulsion.


Understanding these limitations provides insights into the challenges fish face in their underwater habitats. Fish fins, especially the pectoral and dorsal fins, can be a hindrance in tight or confined spaces. Navigating through underwater vegetation or narrow passages becomes challenging, limiting a fish's ability to escape predators or catch prey efficiently. In environments with dense vegetation, fish may struggle to navigate effectively. Fins that are adapted for streamlined swimming may become entangled or hindered, compromising the fish's ability to move swiftly. While fins are designed for hydrodynamic efficiency, their size and shape can contribute to drag. In fast-flowing water or during rapid accelerations, fins may generate resistance, affecting a fish's speed and energy efficiency. The limitations imposed by fins impact both predators and prey. Predatory fish may find it challenging to chase and capture agile prey, while prey species may struggle to evade predators efficiently. Despite the drawbacks associated with fish fins, evolution has equipped various species with specialized adaptations to mitigate these limitations. These adaptations highlight the versatility and resilience of fish in diverse aquatic environments.


In certain species, the dorsal fin has evolved to be smaller or more flexible, reducing drag and improving overall hydrodynamics. This adaptation enhances a fish's ability to move swiftly through the water. In some species, fins may be partially or fully fused, providing greater stability and control. This fusion can be advantageous in environments where precise movements are crucial. The drawbacks associated with fish fins also intersect with human activities and conservation efforts. Overfishing, habitat degradation, and climate change pose additional challenges for fish populations, exacerbating the impact of fin-related limitations. Certain fishing methods, such as trawling, can cause damage to fish fins. The unintended consequences of these practices include injuries to fins, affecting a fish's ability to swim effectively.



Conflict Of Interest

The author declares there is no conflict of interest in publishing this article.