How do cockles feed?

Cockle reproduction occurs between March and August as the warming spring waters climb to above 13C. Peak spatfall occurs May through September.

Fertilization is external, males release up to 15 million sperm/sec. while the females release 1900 eggs/sec. Gamete viability is short, approximately two hours for peak and nil by 8 hours. It takes about 4 days for the veliger to develop into a juvenile cockle and 18 months to maturity. Lifespan can be up to 10 years.

If you are asking how to cook them, re-ask this question in Food & Cooking.