How many whales and dolphins start with S?

12 of the 74 whales and dolphins in Icillion start with S, for example Sperm whale, Spinner dolphin and Spotted dolphin.

What is the longest name among whales and dolphins that start with S?

The longest is “Southern right whale dolphin” and the shortest is “Sei whale”.

Nature · lists

12 whales and dolphins start with S, from “Sei whale” to “Striped dolphin”. Every one of them counts as an answer in Icillion.

S is the most common first letter in this list: 12 of the 74 whales and dolphins (16%).
Shortest: “Sei whale”. Longest: “Southern right whale dolphin”.
12 names have more than one word.
1 can be spelled more than one way, and all the spellings count.

How many whales and dolphins start with S?: 12 of the 74 whales and dolphins in Icillion start with S, for example Sperm whale, Spinner dolphin and Spotted dolphin.
What is the longest name among whales and dolphins that start with S?: The longest is “Southern right whale dolphin” and the shortest is “Sei whale”.

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Seven prompts a day, twenty seconds each. Obvious answers float on the tip of the iceberg; rare ones sink all the way to the trench.