When you catch a fish, you have a choice to make, release it to grow and maybe catch again or keep it. If you plan to release it, do so as soon as possible. Taking a minute for photos is OK, but do so quickly. If you plan to keep it you must first know if it’s legal to keep it.
Taking a fish home for an aquarium or water garden is not recommended. Making a meal from your catch is a better choice provided you know how to clean and prepare it.