Caviar substitutes: Products consumed as caviar but prepared from the eggs of fish other than sturgeon (e.g. salmon, carp, pike, tuna, mullet, cod, lumpfish), which have been washed, cleaned of adherent organs, salted and sometimes pressed or dried. Such fish eggs may also be seasoned and colored. (The United States of America Custom Service (US Customs & Border Protection,
2004) cited in https://www.fao.org/3/a0685e/a0685e.pdf)
A clear-to-yellowish fluid that circulates throughout the body. In addition to its fluid component, lymph consists of white blood cells (especially lymphocytes) and a small concentration of red blood cells and proteins. As lymph circulates, it picks up unwanted materials, such as bacteria and dead cells, which are then filtered through the lymph nodes. Lymph also supplies mature lymphocytes to the blood. (Clinicalinfo Glossary. 2025. Lymph. https://clinicalinfo.hiv.gov/en/glossary/lymph)
For ichthyologists, tuna refers to any of the 14 species of the tribe Thunnini within the family Scombridae. (FAO. 2026. Biological characteristics of tuna. https://www.fao.org/fishery/en/topic/16082/en)
