noun
sand dollar (Astriclypeus mannii)
Refers to a specific species of sand dollar. In everyday Japanese, the katakana name is used.
海岸でスカシカシパンの殻を見つけた。
I found a sand dollar shell on the beach.
The name スカシカシパン is a Japanese compound. The exact derivation is uncertain, but it is thought to combine 透かし (sukashi, 'openwork' or 'pierced') and 菓子パン (kashi pan, 'sweet bread'), possibly from the appearance of the sand dollar's test.