When goldfish swim up to glass of tank, does it mean they are smart enough to recognize people?
Goldfish sure are smart not in sense as dogs are, but they are smart. They will swim up to meet you probably because they think you are going to feed them. They might not be able to differentiate between one person and other but they do know that people they live with are caregivers. Know that they depend on you and hence love you.
Why is a new goldfish not moving in its bowl, when he is very much alive? Well first of all, he probably hates being in a bowl. Goldfish do not like bowls even though humans think bowls are cute. Put him in a tank with a compatible companion goldfish. Meanwhile watch fish. Is he coming up to top of tank when you feed him? If he is then, heís probably just getting used to new bowl. If it looks like he has difficulty swimming and that he keeps sinking to bottom he might have a swim bladder disorder caused by too much dry food and bad water.
Why is a goldfish swimming to top every once in a while? Goldfish keep swimming to surface of tank because thatís where they get their oxygen. Always make sure that there is enough empty space at top. Do not fill up tank to brim, as leaving space will give them required oxygen. If your fish are normally active, swimming and chasing each other a round, donít worry if they swim to top every once in a while.
Why do goldfish always seem starving?
Thatís because they are greedy! Donít get tempted enough to feed them whenever they ask for it because overfeeding will cause them more harm. Besides, goldfish can never starve to death; they are always nibbling away at something or other.