The phrase "attractive specimens" is correct and usable in written English.
It can be used when describing appealing examples of a particular type, often in contexts like biology, art, or collectibles.
Example: "The museum displayed a variety of attractive specimens from the local flora and fauna."
Alternatives: "appealing examples" or "desirable samples".
The plant is a coarse but attractive specimen for the shady wild garden.
One attractive specimen is the "Usain Bolt of bacteria", another lives in our armpits, and one is something that can turn into MRSA if not properly contained (it is).
Human serum stands as an attractive specimen for biomarker discovery using MS because sample acquisition is minimally invasive, and serum is the standard physiological fluid used for diagnostic purposes.
The cost associated with their storage is low, as well, and the significant association between pathological and clinical annotations makes FFPE tissue an attractive specimen for biomarker discovery.
Of course there is an extremely attractive male specimen who our Ali comes into contact with *sniggers*, and I feel the relationship between said specimen (his name is Cole and Alii can be described with the lyrics of Natalia Kills' song Problem.
Umbilical cord blood (UCB) is a very attractive biological specimen, because relatively high volumes (up to tens of milliliters) of this biofluid are available for sampling without posing an added risk and burden to the newborn or its mother in the process.
Sea Shepherd's founder, Paul Watson, blamed the deaths on the lucrative international trade in live dolphins; the most attractive and profitable specimens are selected from the total haul, with the remainder slaughtered and sold in Japan for their meat.
The 17th-century Dutch artist Rembrandt van Rijn painted birds-of-paradise and marine cone shells gathered from the early European exploration of the Pacific, testifying to people's fascination for attractive and interesting specimens from "exotic" locales.
The wonderfully attractive and repulsive "Specimen C.F". looks like a big slug, its glossy body the color and texture of a dill pickle, its raised head a dull mauve with dark grooves gouged into it.
