Observe the temperature performance curve below, which shows swimming speed vs. temperature for goldfish (Carassius auratus L.). Based on the curve below, what is the optimal temperature T(opt) for a swimming goldfish? **Graph Analysis: Maximum Swimming Speed of a Goldfish at Various Temperatures**This graph provides valuable insight into how temperature affects the maximum swimming speed of a goldfish, measured in centimeters per second (cm/s).- **X-axis (Horizontal):** Temperature in degrees Celsius (°C), ranging from 10°C to 40°C.- **Y-axis (Vertical):** Maximum swimming speed in centimeters per second (cm/s), ranging from 10 cm/s to 60 cm/s.**Data Points and Trend:**- At 15°C, the swimming speed is approximately 28 cm/s.- As the temperature increases to 25°C, the speed increases to about 45 cm/s.- The maximum speed, approximately 53 cm/s, occurs around 30°C.- Beyond 30°C, the speed starts to decline sharply, reaching around 32 cm/s at 35°C.**Conclusion:**The goldfish's maximum swimming speed increases with temperature up to 30°C, after which it decreases. This suggests that there is an optimal temperature range for the swimming performance of goldfish, beyond which their efficiency declines.**Image:** The diagram includes an inset image of a goldfish in the top right corner, providing a visual reference to the species being studied.

The temperature performance curve is used to determine the effects on biological processes by virtue of temperature. The temperature has a huge impact on the normal physiology of organisms, especially the poikilotherms (the organisms that are unable to maintain a constant body temperature).The temperature affects the physiological conditions and along with that it also changes the environmental conditions for organisms that may be favourable or unfavourable. The optimal temperature for the swimming of goldfish is 30 degree Celsius at which it is able to swim with maximum speed. This could be due to decreased water resistance but when the temperature exceeds 30 degree Celsius then the physiological functioning might also start to get impaired and hence the swimming speed retards.