One of those gardening radio talk show hosts once told me that toad eggs, and even the tadpoles, could survive in ditches, even when they dry up for weeks. Once it finally rains, they revive and grow. With enough moisture, they can become adults. It sounds hard to believe, but he insisted that they are adapted to surviving, and if it means living through total dry-outs, they are able to do so.
Maybe it's the same for your gold fish eggs.