There are billions of stars in the Milky Way similar to the Sun.

With high probability, some of these stars have Earth-like planets in a circumstellar habitable zone.

Many of these stars, and hence their planets, are much older than the Sun.

If Earth-like planets are typical, some may have developed intelligent life long ago.

Some of these civilizations may be piscine.

Some of these piscine civilizations may have developed interstellar travel, a step humans are investigating now.

Even at the slow pace of currently envisioned interstellar travel, the Milky Way galaxy could be completely traversed in a few million years.

Since many of the Sun-like stars are billions of years older than the Sun, the Earth should have already been visited by extraterrestrial fishlike civilizations, or at least their probes.

However, there is no convincing evidence that this has happened.

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Mrs Fox and I have an excellent relationship due to how well we communicate, even after more than a decade together. She'll tell me something important, I'll spend the day responding only in the medium of half-remembered lyrics from Tom Cardy songs, it's great, she loves it.