The term heterocercal fin is identified in base64 scheme by the sequence aGV0ZXJvY2VyY2FsIGZpbg==, while the MD5 signature is equal to b9dc0a8e9452571b45d7d2cdf1d47a1e. The ASCII encoding of heterocercal fin in hexadecimal notation is 68657465726f63657263616c2066696e.