There is no perfect lens. What's your budget? Do you want one lens to do it all?
You can use just about any lens for landscape, some like wide angle, others telephoto. In general it's nice to have a zoom to allow more flexibility in composition.
Portrait lenses traditionally have a large aperture for a soft look and to allow more flexibilty with light. But just about any lens can take a portrait too. Primes (no zoom) are popular because they're often very sharp, fast, light and you don't really need the flexibility of zoom for portraiture.
Usually people want telephotos for wildlife (although you say up close). Good telephotos cost $$$.
The lenses that came with your camera are fine if there is plenty of light, but you'll really see their shortcomings in something like indoor aquarium. I recommend you do some research to see what you want, but the Canon 50mm 1.8 is a common first non-kit lens for a lot of people because it costs next to nothing, lets in a lot of light, and is reasonably sharp given it's cost. Other people might argue that the $100 could go into the cost of a better lens... they're right, but you never know what you're going to like. I have lens filter that cost $100, it's a nominal cost to see if you like primes.
