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From a monotypic taxon: This is a redirect from a monotypic fish taxon to its only lower-ranking member. In a biology-related article, when for example a family has only one genus, the family may be a redirect to the genus.
Use {{R to monotypic taxon}} when making a redirect to a monotypic taxon from its only member, for example, from a species to the genus of which it is the only member.
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From a cross-project redirect: This is a redirect from a title linked to an item on Wikidata. The Wikidata item linked to this page is Actinistia (Q2637499).