The best replacement for leopard seal is polar bear.

The best alternatives to leopard seal are rated as following:
★★★★★  polar bear
★★★★  penguin
★★★★  killer whale
★★★★  elephant seal
★★★  walrus
★★  sea lion
★★  bull shark
★  emperor penguin
★  steller sea lion

Your alternative for leopard seal is not listed? Suggest!
Speaking about leopard seal, one probably shouldn't forget about photographer.

Other search terms related to leopard seal and their ratings are:
★★★★★ photographer
You have in mind a companion for leopard seal and it is not yet here? Propose!



Google Trends

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leopard seal
polar bear
penguin