Its limpid , globular eyes ; which appear red or blue , also depending on lighting ; are proportionately the largest in the animal kingdom at NUMBER@1 cm -LRB- NUMBER@2 inch -RRB- in diameter .

Its limpid , globular eyes -- which appear red or blue , also depending on lighting -- are proportionately the largest in the animal kingdom at NUMBER@1 cm -LRB- NUMBER@2 inch -RRB- in diameter .
