How do you know when a fish is biting when fishing?

If the creature/animal has scales and a fin then it is a fish. Whales have smooth skin so it's a mammal. Dolphins have smooth skin so it's a mammal try asking him. i hear most fish are quite...

A little hard to answer! However some fish have very bad memory (I think the goldfish is about 3 seconds) and so if they do, they'll soon forget.

yes

I can walk up to my aquarium, and every single one of my fish come straight to the top. However if someone else walks up to the tank they don't even give it a second look. On that note, I can pick up...