Every Corphish card we price, most valuable first. Prices are what copies actually sold for, updated daily.
The same Pokemon is also printed as Team Aqua's Corphish, priced separately because the game treats them as different cards.
What a Corphish card is worth
The most valuable Corphish on this list is Corphish from EX Dragon at $38.90£29.28€34.26, and the 15 priced copies across 12 sets are worth $144£109€127 together. Most of that sits in a handful of printings: the older the set and the scarcer the print run, the wider the gap to the rest.
Corphish is printed in Japanese as well: 10 cards across 10 sets, the most valuable of them Corphish from Rulers of the Heavens at $6.17£4.64€5.43. Switch the list above to Japanese to read those, or to Both to rank the two catalogues against each other.
The highest PSA 10 on record for Corphish sold for $1,189£895.26€1,048. reverse holo printings are priced separately from the standard card, because they do not trade at the same money.
If you are trying to identify which Corphish you have, the set name is printed on the card and the collector number sits in the bottom corner. Open the card here and the page carries every printing of it, the graded prices, and whether grading the copy is worth the fee. Sets to start with: EX Dragon, EX Holon Phantoms, EX Deoxys.