Hydra1-2 is a Ty1/Copia LTR retrotransposon found in the zebrafish Danio rerio (GenBank accession XM_001922068). It is closely related with other Ty1/Copia-like LTR retrotransposon - Hydra1-1 previously found in Hydra magnipapillata - and together they constitute the components of the Hydra clade within Branch 2 of the Ty1/Copia family (Llorens et al. 2009).
The genome of Hydra1-2 is 4148 bp long and encodes a single long ORF of 1336 amino acids with the typical gag-pol structure domains of Ty1/copia LTR retrotransposons (gag, protease, integrase, reverse transcriptase and ribonuclease H). Information about the LTRs of Hydra1-2 is not yet available.