Step 1: Understanding the Concept:
Fishes within the family Cyprinidae exhibit varied spawning strategies.
Many cyprinids produce adhesive eggs that stick to submerged plants or other substrates to protect themselves from drifting into unfavorable environments.
Step 2: Detailed Explanation:
Let us analyze both statements:
- Statement (I) is correct. The Goldfish (Carassius auratus), a popular ornamental member of the family Cyprinidae, produces small, spherical adhesive eggs.
During breeding, the eggs stick to aquatic plants like Hydrilla or water hyacinth roots.
- Statement (II) is correct. The Common carp (Cyprinus carpio), another major cyprinid, also produces highly adhesive, pale-yellow eggs.
In standard hatchery operations, vegetation or artificial grass mats called "kakabans" are placed in breeding hapas to collect these adhesive eggs and prevent them from settling onto the muddy bottom where they would suffocate.
Since both species produce eggs with sticky mucilaginous envelopes that require substrates for attachment, both statements are correct.
Step 4: Final Answer:
Both Statement (I) and Statement (II) are correct, which corresponds to Option (A).